Detection method of asbestos product in ship material

Abstract

The invention belongs to the technical field of asbestos detection, and particularly relates to a method for detecting an asbestos product in a ship material, which comprises the following steps: pretreating the asbestos product in the ship material; carrying out qualitative test on the pretreated ship asbestos product by adopting an X-ray fluorescence spectrophotometer method; carrying out qualitative test on the pretreated ship asbestos product by adopting a polarizing microscope method; carrying out qualitative test on the pretreated ship asbestos product by adopting a scanning electron microscope; performing qualitative testing on the pretreated ship asbestos product by adopting an energy spectrum; performing qualitative testing on the pretreated ship asbestos product by adopting an infrared spectroscopy method; the asbestos product in the ship material is qualitatively identified by integrating test results of an X-ray fluorescence spectrophotometer method, a polarizing microscope method, a scanning electron microscope method, an energy spectrum method and an infrared spectrum method. The method provided by the invention can accurately and efficiently detect the asbestos product in the ship material.

Description

Technical Field

[0001] The invention belongs to the technical field of asbestos detection, and in particular relates to a method for detecting asbestos products in ship materials. Background Art

[0002] The existing asbestos detection technology mainly focuses on the detection of asbestos in products. The invention patent with application number 201210592315.0 discloses "A method for detecting asbestos content in a sample". This method only involves quantitative analysis of asbestos products, and does not involve qualitative testing for the determination of asbestos types. The invention patent with application number 202010512951.2 discloses "A method for determining asbestos content in brake pads by scanning electron microscope-energy spectrometer". This invention patent technology only involves the test of asbestos content in brake pads, not ship products.

[0003] In the process of asbestos detection, X-ray diffraction is the most commonly used method for testing asbestos. Its principle is that each mineral has a specific X-ray diffraction peak, and the diffraction intensity is proportional to the content. It can test whether a sample contains a certain asbestos mineral and determine the content. However, a single XRD test cannot accurately perform qualitative analysis on the sample. The polarizing microscope method has relatively high requirements for sample pretreatment steps. If the pretreatment method is not appropriate, it is difficult to obtain correct results when observing with a polarizing microscope. The scanning electron microscope method has fewer sample pretreatment steps. It is easier to identify asbestos products with higher purity by scanning electron microscope photos, but it is more difficult to identify test samples with more complex matrices by scanning electron microscope.

[0004] Asbestos is a type of hydrated silicate with thermal dehydration reaction. Asbestos products can be tested using a thermogravimetric analyzer, but based on current testing research, no regular test results have been obtained, so it can only be used as an auxiliary testing method; infrared spectroscopy is based on the infrared characteristic absorption peaks of asbestos minerals, but due to the interference of the complex matrix in asbestos products, the characteristic spectral lines will be offset. At the same time, asbestos samples also have Si-O skeletons and hydroxyl stretching vibrations absorbed in the mid-infrared (MIR) region. Only the infrared absorption spectrum of chrysotile is highly specific, and the absorption peaks of other types of asbestos are weaker, so it can only be used as an auxiliary means of qualitative analysis of asbestos.

[0005] The matrix of asbestos products in ship materials is complex. Asbestos products exist in various parts of the ship. Propeller shafts, diesel engines, turbine engines, pipeline flanges, gaskets, insulation boards and cable insulation materials may contain asbestos. Long-term use of asbestos seriously threatens the lives of shipbuilding workers. When a ship is dismantled, asbestos is a potential hazardous substance that may enter the water, soil and air as the ship is dismantled, posing potential hazards to both humans and organisms. Therefore, various countries have called for reducing or even banning the use of asbestos.

[0006] Therefore, it is of great significance to establish a method for detecting asbestos content in ship materials. At present, there is no method and standard for detecting asbestos in ship materials in China. This program is to establish a qualitative detection method for ship asbestos products to accurately and quickly obtain the type of asbestos.

[0007] In view of this, the present invention proposes a method for detecting asbestos products in ship materials. Summary of the invention

[0008] To achieve the above object, the present invention provides a method for detecting asbestos products in ship materials. The specific technical scheme is as follows: A method for detecting asbestos products in ship materials, comprising:

[0009] Asbestos products in ship materials are pre-treated, with grinding and crushing for inorganic products and muffle furnace heating for organic products; X-ray fluorescence spectrometer is used to conduct qualitative testing on pre-treated ship asbestos products; polarizing microscope is used to conduct qualitative testing on pre-treated ship asbestos products; scanning electron microscope is used to conduct qualitative testing on pre-treated ship asbestos products; energy spectrum is used to conduct qualitative testing on pre-treated ship asbestos products; infrared spectrum is used to conduct qualitative testing on pre-treated ship asbestos products; and the test results of X-ray fluorescence spectrometer, polarizing microscope, scanning electron microscope, energy spectrum and infrared spectrum are comprehensively used to qualitatively identify asbestos products in ship materials.

[0010] As a preferred embodiment of the method for detecting asbestos products in ship materials of the present invention, the pretreatment method of the inorganic products includes crushing the asbestos products in the ship materials with an agate mortar, sieving them with a sieve, repeating the preparation until all the asbestos product samples are sieved, and mixing the sieved asbestos product samples together as analysis samples.

[0011] As a preferred embodiment of the method for detecting asbestos products in ship materials described in the present invention, the pretreatment method of organic products includes taking part of the sample and placing it in a muffle furnace for heating for a period of time, then closing the muffle furnace, cooling the sample in the muffle furnace to room temperature, and then testing and analyzing the obtained sample.

[0012] As a preferred embodiment of the method for detecting asbestos products in ship materials described in the present invention, the test conditions of the X-ray fluorescence spectrometer method include setting the cathode to copper; setting the divergence slit, detector slit, voltage, current, scanning range, scanning rate and step rate.

[0013] As a preferred embodiment of the method for detecting asbestos products in ship materials described in the present invention, the testing method of the polarizing microscope method includes adding the analysis sample and pure water into a centrifuge tube, shaking it evenly, and aspirating the liquid and dropping it on a glass slide, leaving it to dry, dropping a refractive liquid, and covering it with a cover glass for observation.

[0014] As a preferred embodiment of the method for detecting asbestos products in ship materials of the present invention, the scanning electron microscope test method includes cutting the conductive glue and gently sticking it on the sample stage, leaving no gap between the conductive glue and the bottom of the sample stage, clamping part of the sample and sticking it on the surface of the conductive glue, and using an ear-cleaning bulb to blow away the excess sample on the surface;

[0015] The surface of the sample stage was gold-sprayed using an ion sputtering apparatus; the working voltage and current of the scanning electron microscope were adjusted, as well as the test distance and magnification; and the asbestos morphology was observed at different magnifications.

[0016] As a preferred embodiment of the method for detecting asbestos products in ship materials of the present invention, the energy spectrum testing method includes using a scanning electron microscope energy spectrum to perform elemental qualitative and semi-quantitative analysis of six asbestos minerals in ship materials;

[0017] The quantitative results are converted according to the relative molecular mass of the corresponding elements to obtain the atomic ratio of the characteristic elements of asbestos minerals, and compared with the theoretical atomic ratio of asbestos minerals.

[0018] As a preferred embodiment of the method for detecting asbestos products in ship materials described in the present invention, the infrared spectroscopy test method includes testing the asbestos analysis sample, detecting the energy value of the infrared spectroscopy equipment, adjusting the dynamometer at the beginning of the test analysis, and performing a confirmation test after the infrared spectrum is clear and stable.

[0019] As a preferred embodiment of the method for detecting asbestos products in ship materials of the present invention, the types of asbestos include chrysotile, amosite, crocidolite, tremolite, actinolite and hornblende asbestos;

[0020] As a preferred embodiment of the method for detecting asbestos products in ship materials of the present invention, the asbestos products in ship materials are qualitatively identified by combining the test results of X-ray diffraction, polarizing microscopy, scanning electron microscopy, energy spectrum and infrared spectroscopy.

[0021] Beneficial effects of the present invention: The testing method of the present invention can classify ship asbestos products and can better pre-treat samples.

[0022] The present invention adopts the XRD method to test the ship asbestos products, and can scan the samples by searching for features, which can greatly shorten the time of full-angle scanning;

[0023] The present invention adopts the PLM method to test asbestos, and can observe the optical characteristics of different ship asbestos products, and can judge and analyze different types of asbestos through the different polarized patterns obtained;

[0024] The SEM method used in the present invention can observe the microscopic and morphological characteristics of ship asbestos, and combined with XRD and PLM images, the type of asbestos can be more accurately determined;

[0025] The EDS method adopted in the present invention can determine and analyze the element composition content of ship asbestos products, and the type of asbestos can be determined by comparing the analysis results.

[0026] The IR method used in the present invention fully proves that asbestos products are silicate compounds, the infrared absorption spectrum of chrysotile is highly specific, and the proportion of hydroxyl groups in the amphibole asbestos component is relatively small, so the hydroxyl stretching vibration absorption peak in the high wave number band is relatively weak. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0028] Figure 1 A flow chart of a method for detecting asbestos products in ship materials provided by the present invention;

[0029] Figure 2 Six asbestos characteristic spectral lines provided by the present invention;

[0030] Figure 3 Polarized light microscopic images of six types of asbestos provided by the present invention;

[0031] Figure 4 Six types of low-power morphological images of asbestos provided by the present invention;

[0032] Figure 5 Six high-magnification morphological images of asbestos provided by the present invention;

[0033] Figure 6 The infrared analysis test spectrum of chrysotile asbestos provided by the present invention;

[0034] Figure 7 The infrared analysis test spectrum of amosite provided by the present invention;

[0035] Figure 8 The infrared analysis test spectrum of crocidolite provided by the present invention;

[0036] Fig. 9The infrared analysis test spectrum of the amphibole provided by the present invention;

[0037] Fig.10 The infrared analysis test spectrum of actinolite provided by the present invention;

[0038] Fig.11 This is the infrared analysis test spectrum of anthophyllite provided by the present invention. DETAILED DESCRIPTION

[0039] In order to better understand the present invention, a more detailed description will be made of various aspects of the present invention with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0040] Example 1

[0041] Reference Figures 1 to 11 , which is the first embodiment of the present invention, provides a method for detecting asbestos products in ship materials.

[0042] S1: Pre-treatment of ship asbestos products.

[0043] Ship asbestos products are divided into two types: inorganic products and organic products according to the different matrix.

[0044] S101: For inorganically manufactured ship asbestos products, grinding and crushing are used for pretreatment; for products with a large amount of samples, they are crushed with an agate mortar and sieved with a 420μm to 500μm sieve. The preparation is repeated until all samples are sieved, and the sieved samples are mixed together as analytical samples.

[0045] S102: For organic products such as ship asbestos products, carry out organic analysis samples. Take a small amount of sample and heat it in a muffle furnace at a temperature of 450℃±10℃ for 1 hour. Then close the muffle furnace and let the sample cool to room temperature in the muffle furnace. Then, test and analyze the obtained sample.

[0046] S2: X-ray fluorescence spectrometer method (XRD method) qualitative testing of ship asbestos products.

[0047] The conditions for testing ship products by XRD method were set as follows: cathode: copper (Cu); divergence slit (TwinPrimary): 0.6 mm, detector slit (TwinSecondary): 5.00 mm; voltage: 40 KV, current: 40 mA; scanning range (2θ): 5°-35°; scanning rate: 5° / min; step rate: 0.02° / step.

[0048] The characteristic spectral lines of six types of asbestos were obtained by XRD method. Through X-ray fluorescence spectrometer method (XRD method) test and analysis, it can be concluded that each type of asbestos has a characteristic spectral peak. The characteristic spectral peak positions of the six types of asbestos were obtained, as shown in Table 1.

[0049] It can be seen from Table 1 that in the initial screening stage of samples, judgment can be made based on the characteristic spectral lines of asbestos. Figure 2 Indicates the six characteristic spectral lines of asbestos tested in ship products.

[0050] Table 1 Positions of the characteristic spectral lines of six types of asbestos

[0051]

[0052] S3: Polarized light microscopy (PLM) method is used for qualitative testing of asbestos products in ships.

[0053] Add 3mg-6mg of the analytical sample and about 10mL of pure water to a 15mL plastic centrifuge tube, shake vigorously, use a plastic dropper to absorb 10-20 microliters of the liquid (about 4 drops from a 10mL dropper), drop it on a glass slide, leave it to dry (usually 4 hours), then add 1-2 drops of refractive fluid and cover it with a coverslip for observation.

[0054] When polarized light needs to be observed immediately, add a small amount of anhydrous ethanol (usually 1-2 mL) when preparing the liquid sample, and place the cover glass on an electric heating plate and heat it to 100℃±10℃. After drying, drop the refractive liquid on it. The polarized light microscopic images of six types of asbestos in ship products observed under a polarizing microscope are shown in Figure 1. Figure 3 .

[0055] It should be noted that through testing and analysis, it can be concluded that asbestos is ductile, pleochroic, and extinct; the polarized microscopic image of each type of asbestos has unique properties: Chrysotile: twisted wavy fiber bundles with large bundles at the ends; Amosite: straight-chain fiber bundles with broom-shaped or figure-eight-shaped bundle ends; Crocidolite: straight-chain fiber bundles, longer fibers are curved, and the tail ends are figure-eight-shaped; Tremolite and Actinolite: relatively similar, straight and curved fibers, and large bundles with figure-eight-shaped ends.

[0056] S4: Scanning electron microscope (SEM method) qualitative testing of ship asbestos products.

[0057] Cut a piece of conductive glue of appropriate size and gently stick it on the sample table, ensuring that there is no gap at the bottom. Use fine-mouthed metal tweezers to pick up a small amount of sample and gently stick it on the surface of the conductive glue. Use an ear bulb to blow away excess sample on the surface.

[0058] Use an ion sputtering device to spray gold on the surface of the sample stage, and the time is set to 10s; adjust the working voltage of the scanning electron microscope to 15kV, the working current to 10nA, and adjust the test distance and magnification according to the sample test conditions.

[0059] The asbestos morphology was observed at low and high magnifications. Figure 4 , high magnification morphology Figure 5 .

[0060] From the scanning electron microscope microscopic morphology analysis of asbestos, it can be seen that the six types of asbestos minerals are mainly in a fibrous state. Under high magnification, nanometer-scale original fibers and fiber bundle aggregates composed of a large number of original fibers can be observed.

[0061] S5: Energy spectrum (EDS method) qualitative test for testing ship asbestos products.

[0062] The elemental qualitative and semi-quantitative analysis of six asbestos minerals in ship materials was carried out using scanning electron microscope energy spectrum, with the voltage set to 100 kV. The results are shown in Table 2.

[0063] Table 2 EDS spectrum element content test results of six asbestos minerals in ship materials

[0064]

[0065]

[0066] The quantitative results in Table 2 were converted according to the relative molecular mass of the corresponding elements to obtain the atomic ratio of the characteristic elements of asbestos minerals, and compared with the theoretical atomic ratio of asbestos minerals. The specific results are shown in Table 3.

[0067] Table 3 Molar content of six asbestos mineral elements and atomic ratio of characteristic elements in ship materials

[0068]

[0069] It should be noted that in Table 3, * indicates that the calculation is performed by adding magnesium and iron elements.

[0070] After converting the elemental analysis results of several types of asbestos into atomic ratios, it can be found that the measured values ​​are basically consistent with the theoretical elemental composition of the corresponding asbestos. Except for tremolite and actinolite, which have the same molecular formula [Ca2Mg5S i8O22(OH)2], other types of asbestos can be effectively distinguished by EDS elemental analysis.

[0071] S6: Qualitative testing of ship asbestos products by infrared spectroscopy (IR method).

[0072] The asbestos analysis sample is tested, the energy value of the infrared spectrum equipment is detected, and the dynamometer is adjusted at the beginning of the test analysis. After the infrared spectrum is clear and stable, the confirmation test is carried out.

[0073] The infrared test selects the ATR test mode, and the test wave number range is 600cm-1—4000cm-1. The infrared analysis test spectra of six asbestos minerals in ship materials are shown in Figures 6 to 11 shown.

[0074] From the infrared spectrum analysis of the samples, it can be seen that the asbestos sample has SiO skeleton and hydroxyl stretching vibration in the mid-infrared (MIR). The infrared absorption spectrum of chrysotile has strong specificity, with the main absorption peaks being the hydroxyl stretching vibration absorption at 3680-3685cm-1 and 3658-3618cm-1, and the SiO2i stretching vibration in the range of 975-930cm-1.

[0075] Compared with chrysotile asbestos, the proportion of hydroxyl groups in the amphibole asbestos component is smaller, so the hydroxyl stretching vibration absorption peak in the high wavenumber band is weaker. The main absorption peak is located below 1100cm-1, which is a typical stretching vibration peak of S iOS i. Different types of amphibole asbestos have specific fingerprint peaks, which can be used for type identification.

[0076] The present invention is the first to conduct a comprehensive analysis of the testing of asbestos in ship products, adopt different testing methods for mutual verification, and fully analyze the testing methods of asbestos products in ship materials.

[0077] The present invention adopts the test of the six asbestos characteristic spectral line positions proposed in the XRD method test, thereby avoiding the shortcomings of the traditional test of wide test angle range and long test time.

[0078] Based on the XRD test characteristic spectrum, the present invention can use a polarizing microscope to test and analyze the ship sample with the characteristic spectrum, and according to the different polarizing microscope images of each asbestos, different asbestos products can be judged and analyzed.

[0079] The SEM, EDS and IR tests disclosed in the present invention are mainly used to verify the XRD and PLM methods. The mechanism of ship products is relatively complex and contains false positive products. Therefore, based on the scanning electron microscope spectrum, energy spectrum element content and infrared characteristic absorption peaks, false positive samples can be fully excluded to obtain the prepared test results.

[0080] Example 2

[0081] The second embodiment of the present invention is different from the previous embodiment in that:

[0082] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-On lyMemory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program codes.

[0083] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0084] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0085] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0086] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0087] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0088] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for detecting asbestos products in ship materials, characterized in that: include: Pre-treatment of asbestos products in ship materials: grinding and crushing for inorganic products and heating in muffle furnace for organic products; The X-ray fluorescence spectrometer method is used to conduct qualitative testing on the pre-treated ship asbestos products; The polarizing microscope method is used to conduct qualitative testing on the pre-treated ship asbestos products; Scanning electron microscope is used to conduct qualitative test on the pre-treated ship asbestos products; Use energy spectrum to conduct qualitative test on pre-treated ship asbestos products; The infrared spectroscopy method is used to conduct qualitative testing on the pre-treated ship asbestos products; Based on the test results of X-ray fluorescence spectrometer, polarizing microscope, scanning electron microscope, energy spectrum and infrared spectrum, asbestos products in ship materials are qualitatively identified.

2. The method for detecting asbestos products in ship materials according to claim 1, characterized in that: The pretreatment method of inorganic products includes crushing the asbestos products in the ship materials with an agate mortar, sieving them with a sieve, repeating the preparation until all the asbestos product samples are sieved, and mixing the sieved asbestos product samples together as analysis samples.

3. The method for detecting asbestos products in ship materials according to claim 2, characterized in that: The pretreatment method of organic products includes taking part of the sample and putting it into a muffle furnace for heating for a period of time, then closing the muffle furnace, allowing the sample to cool to room temperature in the muffle furnace, and then testing and analyzing the obtained sample.

4. The method for detecting asbestos products in ship materials according to claim 3, characterized in that: The test conditions of the X-ray fluorescence spectrometer method include setting the cathode to copper; setting the divergence slit, the detector slit, the voltage, the current, the scanning range, the scanning rate and the step rate.

5. The method for detecting asbestos products in ship materials according to claim 4, characterized in that: The testing method of the polarizing microscope method includes adding the analysis sample and pure water into a centrifuge tube, shaking it evenly, and dripping the liquid onto a glass slide, leaving it to dry, dripping a refractive liquid, and covering it with a cover glass for observation.

6. The method for detecting asbestos products in ship materials according to claim 5, characterized in that: The testing method of the scanning electron microscope includes cutting the conductive glue and gently sticking it on the sample stage, with no gap between the conductive glue and the bottom of the sample stage, clamping part of the sample and sticking it on the surface of the conductive glue, and using an ear-cleaning bulb to blow away excess sample on the surface; Use an ion sputtering device to spray gold on the surface of the sample stage; Adjust the working voltage and current of the SEM, as well as the test distance and magnification; The asbestos morphology was observed at different magnifications.

7. A method for detecting asbestos products in ship materials according to claim 6, characterized in that: The energy spectrum testing method includes using a scanning electron microscope energy spectrum to conduct elemental qualitative and semi-quantitative analysis of six asbestos minerals in ship materials; The quantitative results are converted according to the relative molecular mass of the corresponding elements to obtain the atomic ratio of the characteristic elements of asbestos minerals, and compared with the theoretical atomic ratio of asbestos minerals.

8. The method for detecting asbestos products in ship materials according to claim 7, characterized in that: The infrared spectroscopy test method includes testing the asbestos analysis sample, detecting the energy value of the infrared spectroscopy equipment, adjusting the dynamometer at the beginning of the test analysis, and conducting a confirmation test after the infrared spectrum is clear and stable.

9. The detection method according to claim 8, characterized in that: The types of asbestos include chrysotile, amosite, crocidolite, tremolite, actinolite and hornblende asbestos.

10. A method for detecting asbestos products in ship materials according to claim 9, characterized in that: Based on the test results of X-ray diffraction, polarizing microscopy, scanning electron microscopy, energy spectrum and infrared spectroscopy, asbestos products in ship materials are qualitatively identified.

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