Ocean effluent ceramic cultural relic iron condensate remover and preparation method and application thereof

Abstract

The invention relates to an ocean effluent ceramic cultural relic iron condensate remover and a preparation method and application thereof.The ocean effluent ceramic cultural relic iron condensate remover is mainly composed of natural organic compounds such as glutamic acid, glycine, ascorbic acid and oxalic acid and common inorganic salts such as potassium chloride, sodium chloride and sodium carbonate, and main components of the ocean effluent ceramic cultural relic iron condensate remover are safe, non-toxic and environmentally friendly. The method is high in iron condensate removal efficiency, mild in property (the pH value ranges from 6 to 7) and safe in removal process, the glaze surface and the matrix of the marine effluent ceramic cultural relic cannot be damaged in the removal process, the basic principle of cultural relic protection is met, and the bottleneck problems that an existing method is low in safety and poor in iron condensate removal effect are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of cultural relics protection, and in particular relates to an agent for removing iron condensates from marine ceramic cultural relics, and a preparation method and application thereof. Background Art

[0002] my country is an ancient civilization with a long history and a maritime power. Its vast seas and inland waters preserve a wealth of underwater heritage, among which ceramic cultural relics are the largest and most precious. In recent years, with the development of underwater archaeology, a large number of ceramic cultural relics have been discovered in waters around the world, including the South China Sea. These ceramic cultural relics not only represent the ultra-high level of Chinese ceramic technology at that time, but also provide us with valuable physical materials for studying the ancient Maritime Silk Road. However, due to the influence of long-term seawater immersion and microbial activity, a large number of marine ceramic cultural relics have formed reddish-brown iron condensates on their surfaces, which cover up the color, patterns and other information of the artifacts themselves, seriously affecting the appearance of the cultural relics, and may even cause further corrosion and deterioration of the ceramic cultural relics.

[0003] So far, the research on various salt deposition diseases on the surface of marine ceramic cultural relics at home and abroad still lacks scientificity and systematicness, and no targeted iron coagulant removal measures have been formed. In the field of cultural relic protection technology, the prior art "Equipment and method for removing biological coagulants from marine ceramic cultural relics" (publication number: CN118237331A) discloses a method for removing biological coagulants from marine ceramic cultural relics by combining temporary solid materials, biological enzymes and ultrasonic oscillation. The above method has a good effect on the removal of biological coagulants formed by the attachment of shellfish, corals, barnacles and other seabed organisms, but is not suitable for the removal of iron coagulants with goethite and lepidocrocite as the main components. In addition, the use of ultrasonic oscillation introduces obvious mechanical disturbances to the cultural relics, which is particularly detrimental to the safety of low-temperature overglaze colors, low-temperature glaze porcelain and other types of fragile ceramic cultural relics. The prior art "A method for softening and cleaning condensate around ceramic artifacts recovered from the ocean" (publication number: CN102698980A) discloses a method for softening and cleaning calcium condensate on ceramic artifacts recovered from the ocean. The method uses a mixed solution of hydrochloric acid, EDTA-2Na and citric acid to remove hard condensate with calcium carbonate as the main component on the surface of ceramic artifacts recovered from the ocean. However, considering that the thickness of iron condensate is usually thin, the use of strong acidic reagents will inevitably cause corrosion damage to the artifact body. The prior art "Laser cleaning method for contaminated layer on the surface of an object" (publication number: CN108971142A) discloses a method for achieving the purpose of cleaning by generating thermal stress through laser scanning and irradiation to cause contaminants to peel off the surface of ceramic artifacts. However, the above method does not consider that the thermal stress generated by laser irradiation may cause cracking and peeling of the glaze layer, and is obviously not suitable for fragile ceramic artifacts.

[0004] In the field of semiconductor cleaning technology, the prior art "A cleaning method for removing contaminants deposited on the surface of a ceramic layer" (authorization number: CN115846289B) discloses a method for cleaning contaminants on the surface of a ceramic layer by combining mechanical grinding and chemical immersion. However, the mechanical grinding method involved in the above technology will cause irreversible changes to the surface of ceramic cultural relics recovered from the ocean, which does not comply with the principle of minimum intervention in cultural relic protection. In addition, the prior art "A method for removing iron from ceramic products" (publication number: CN116120074A) in the field of ceramic processing discloses a method for removing iron from ceramic product slurry, which is significantly different from the present invention in terms of application objects and technical principles.

[0005] In general, the existing technologies contained in the literature, patents and relevant standards and specifications in various technical fields cannot meet the needs of removing iron condensates from ceramic artifacts recovered from the ocean. Mechanical removal and laser cleaning methods have the potential risk of causing secondary damage to the surface of the artifacts. Although chemical cleaning is relatively safe, the various reagents used will also cause some damage to ceramic artifacts. Generally speaking, the stronger the removal ability of the reagent, the more serious the accompanying protective damage. Therefore, it is urgent to develop an efficient and safe remover of iron condensates to support the value interpretation and display of ceramic artifacts recovered from the ocean. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the existing methods for cleaning and removing iron condensates from ceramic cultural relics in terms of removal effect and safety, and to provide an efficient remover of iron condensates suitable for marine water-discharged ceramic cultural relics and its preparation method and application. The efficient remover of iron condensates from marine water-discharged ceramic cultural relics mainly consists of natural organic compounds such as glutamic acid, glycine, ascorbic acid and oxalic acid and common inorganic salts such as potassium chloride, sodium chloride and sodium carbonate, and its main components are safe, non-toxic and green. It has high removal efficiency for iron condensates, mild properties (pH value is between 6 and 7), safe removal process, and will not cause damage to the glaze and body of marine water-discharged ceramic cultural relics during the removal process. It complies with the basic principles of cultural relic protection and solves the bottleneck problems of low safety and poor removal effect of iron condensates in existing methods.

[0007] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0008] The first aspect of the present invention provides a remover for iron condensates in ceramic cultural relics recovered from the ocean, wherein the iron condensate remover comprises components in the following concentrations: 0.05-0.1 mol / L ascorbic acid, 0.05-0.1 mol / L glycine, 0.05-0.1 mol / L glutamic acid, 0.05-0.1 mol / L oxalic acid, 0.1-0.5 mol / L sodium chloride, 0.1-0.5 mol / L potassium chloride and 0.1-0.2 mol / L sodium carbonate, and the pH value of the iron condensate remover is 6-7.

[0009] In a preferred embodiment of the present invention, the iron condensate remover includes components in the following concentrations: ascorbic acid 0.085 mol / L, glycine 0.065 mol / L, glutamic acid 0.070 mol / L, oxalic acid 0.080 mol / L, sodium chloride 0.34 mol / L, potassium chloride 0.34 mol / L and sodium carbonate 0.19 mol / L.

[0010] The second aspect of the present invention provides a method for preparing the iron condensate remover as described in the first aspect above, the preparation method comprising:

[0011] Step A: adding ascorbic acid, glycine, glutamic acid, oxalic acid, potassium chloride and sodium chloride into deionized water, and ultrasonically dispersing to form a remover stock solution;

[0012] Step B: adding sodium carbonate to deionized water and dispersing by ultrasonic to form a pH regulating solution;

[0013] Step C: The remover stock solution and the pH adjusting solution are mixed in a certain proportion, and the pH value is adjusted to 6-7 to obtain the iron condensate remover.

[0014] In a preferred embodiment of the present invention, the mixing ratio of the remover stock solution and the pH adjusting solution is 1:0.9-1.1; preferably 1:1.

[0015] In a preferred embodiment of the present invention, the remover stock solution includes components with the following concentrations: ascorbic acid 0.17 mol / L, glycine 0.13 mol / L, glutamic acid 0.14 mol / L, oxalic acid 0.16 mol / L, sodium chloride 0.68 mol / L, and potassium chloride 0.68 mol / L.

[0016] In a preferred embodiment of the present invention, the pH adjusting solution is a sodium carbonate aqueous solution with a concentration of 0.38 mol / L.

[0017] The third aspect of the present invention provides an application of the iron condensate remover according to the first aspect in the safe removal of iron condensate on the surface of ceramic cultural relics recovered from the ocean, comprising the following steps:

[0018] Step A: Characterization and analysis of iron condensates in marine ceramic artifacts and assessment of their preservation status;

[0019] Step B: using the iron condensate remover as described in the first aspect above to remove the iron condensate on the surface of the ceramic cultural relics recovered from the ocean;

[0020] Step C: cleaning and removing residual reagents from the ceramic artifacts recovered from the ocean after the iron condensate is removed;

[0021] Step D: Evaluate the removal of iron condensate.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The invention relates to a highly efficient remover for iron condensates in marine water-discharged ceramic cultural relics, which is mainly composed of natural organic compounds such as glutamic acid, glycine, ascorbic acid and oxalic acid, and common inorganic salts such as potassium chloride, sodium chloride and sodium carbonate. The main components thereof are widely available and are all water-soluble substances, do not contain heavy metal ions, are green and non-toxic, and are friendly to the human body and the environment. The remover prepared in a specific proportion has a good effect of removing iron condensates in marine water-discharged ceramic cultural relics, and can remove iron-containing compounds that have penetrated into cracks, flakes and carcasses of glaze surfaces, with a removal rate of up to 97%. The reaction in the removal process is mild, with a pH value between 6 and 7, and can react with iron condensates on the surface of ceramic cultural relics in a near-neutral environment, without causing damage to the ceramic cultural relics, and conforms to the minimum intervention principle for cultural relic protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following is a further description with reference to the accompanying drawings.

[0025] Figure 1 This is a comparison of the surface morphology of the ceramic cultural relic fragments recovered from the water before and after the treatment in Example 1 of the present invention (the left picture is before the treatment, and the back picture is after the treatment).

[0026] Figure 2 This is a comparison of the surface morphology of the ceramic cultural relic fragments recovered from the water before and after the treatment of Comparative Example 1 (the left picture is before treatment, and the back picture is after treatment).

[0027] Figure 3 This is a comparison of the surface morphology of the ceramic cultural relic fragments recovered from the water before and after the treatment of Comparative Example 2 (the left picture is before treatment, and the back picture is after treatment).

[0028] Figure 4 This is a comparison of the surface morphology of the ceramic cultural relic fragments recovered from the water before and after the treatment of Comparative Example 3 (the left picture is before treatment, and the back picture is after treatment). DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In some embodiments of the present invention, a remover for removing iron condensate from ceramic cultural relics recovered from the ocean is provided, comprising the following components: ascorbic acid, glycine, glutamic acid, oxalic acid, sodium chloride, potassium chloride and sodium carbonate. The preparation of the above-mentioned iron condensate remover comprises the following steps:

[0031] Step A: Add ascorbic acid, glycine, glutamic acid, oxalic acid, potassium chloride and sodium chloride to deionized water, and ultrasonically disperse to form a remover stock solution; for example, dissolve 30g of ascorbic acid, 10g of glycine, 20g of glutamic acid, 15g of oxalic acid, 40g of potassium chloride and 50g of sodium chloride in 1000mL of deionized water to form a remover stock solution, and the specific method is not limited.

[0032] Step B: adding sodium carbonate to deionized water and performing ultrasonic dispersion to form a pH adjusting solution; for example, dissolving 40 g of sodium carbonate into 1000 mL of deionized water to form a pH adjusting solution, which is not specifically limited.

[0033] Step C: Mix the remover stock solution and pH adjusting solution in a specific ratio, and adjust the pH value to 6-7 to obtain the iron condensate remover. For example, mix the remover stock solution and pH adjusting agent in a volume ratio of 1:1, adjust the pH value to 6.5, and obtain the iron condensate remover, and finally seal and store for later use.

[0034] The remover prepared by the above method has a high removal rate for iron condensate on the ceramic surface, is green and environmentally friendly, and does not cause damage to ceramic cultural relics. The process of safely removing iron condensate from ceramic cultural relics discharged from the ocean based on the above iron condensate remover includes:

[0035] Step A: Characterization and analysis of iron condensates in marine ceramic artifacts and assessment of their preservation status.

[0036] The surface morphology of the ceramic artifacts recovered from the ocean was collected using a digital camera to record the distribution of iron condensates on the surface. The chemical element composition of at least five different local areas of the recovered ceramic artifacts before the iron condensates were removed was collected using a portable X-ray fluorescence spectrometer (XRF). Combined with the surface morphology observation results and the type of artifacts, the preservation status of the recovered ceramic artifacts was evaluated.

[0037] Step B: Removal of iron condensates from ceramic artifacts recovered from the ocean.

[0038] For high-temperature glazed ceramic cultural relics that are in good condition and have not experienced glaze peeling or dissolution, select an open container with appropriate volume and depth according to the shape and size of the water-extracted ceramic cultural relics, and put an appropriate amount of the above-mentioned iron condensate remover into the above-mentioned open container, so that the liquid level is more than 5 cm above the water-extracted ceramic cultural relics to be treated. Slowly immerse the water-extracted ceramic cultural relics to be treated in the above remover solution and keep them still to carry out several cycles of iron condensate removal treatment. Each treatment cycle lasts 24 hours. After one cycle, it is determined whether the next cycle of removal treatment is needed based on the evaluation results of the iron condensate removal effect.

[0039] For low-temperature glazed porcelain and fragile water-excavated ceramic artifacts with glaze peeling, dissolution and other phenomena on the surface, it is advisable to use temporary solid materials to pre-reinforce the local areas prone to peeling before carrying out the subsequent iron condensate removal treatment. According to the surface condition of the water-excavated ceramic artifacts, the above-mentioned remover solution is loaded with pulp or gel as a carrier, and several cycles of iron condensate removal treatment are carried out by applying. Each treatment cycle lasts 24 hours. After a cycle, the applied material is removed from the surface of the protected water-excavated ceramic artifacts to evaluate the effect of iron condensate removal. Based on the evaluation results, it is decided whether the next cycle of removal treatment is needed.

[0040] Step C: Clean and remove residual reagents.

[0041] The ceramic artifacts that have been treated to remove iron condensate are placed in deionized water for static soaking to remove the reagent residues in the previous step. The deionized water is replaced every 12 hours and at least 4 times.

[0042] Step D: Evaluation of iron condensate removal effect.

[0043] The weight, surface morphology and chemical element composition of the ceramic cultural relics sample after the iron condensate removal treatment were collected by the method described in step A. The iron condensate removal rate was evaluated by the change in Fe element content before and after the iron condensate removal treatment according to the following formula:

[0044] R=(S_0-S) / S_0×100%

[0045] Where R is the iron removal rate, S0 is the Fe content on the surface measured by portable XRF before the removal of iron condensate, and S is the Fe content on the surface of the cultural relics after the removal of iron condensate measured by portable XRF.

[0046] Based on the removal effect of iron condensate and the protective damage, the next step is determined as follows:

[0047] If R ≥ 95%, it is considered that the end point of iron condensate removal has been reached, and the next cycle of iron condensate removal treatment will not be carried out;

[0048] If R<95%, and there is no glaze loss, glaze dissolution, cracking or peeling on the surface of the ceramic cultural relic, then the next cycle of iron condensate removal treatment will be continued;

[0049] If R<95%, but any phenomenon including but not limited to glaze loss, glaze dissolution, cracking or peeling is observed on the surface of the ceramic cultural relic, the subsequent iron condensate removal treatment should be stopped immediately.

[0050] By measuring the mass loss rate W of simulated ceramic cultural relic samples after immersion in iron condensate remover for 7 days, combined with the iron condensate removal rate R, the ratio of components can be optimized. The mass loss rate determination process is as follows:

[0051] The simulated ceramic cultural relic sample was dried and weighed, and the mass was m_0. The simulated ceramic cultural relic sample was soaked in an iron condensate remover, taken out after 7 days, rinsed with deionized water, and dried. The weighed mass was recorded as m, from which the mass loss rate W of the simulated ceramic cultural relic sample in the iron condensate remover can be calculated:

[0052] W=(m_0-m) / m_0×100%

[0053] For example, in some embodiments, the concentrations of the components in the iron condensate remover are: ascorbic acid 0.085 mol / L, glycine 0.065 mol / L, glutamic acid 0.070 mol / L, oxalic acid 0.080 mol / L, sodium chloride 0.34 mol / L, potassium chloride 0.34 mol / L and sodium carbonate 0.19 mol / L.

[0054] Through the above-mentioned detection process, it can be measured that the iron condensate remover of the above-mentioned component has a removal rate of 97% for iron condensates on the surface of ceramic cultural relic fragments, and the mass loss rate of the simulated ceramic cultural relic sample after immersion in it for 7 days is 0%, indicating that the iron condensate remover has a high efficiency in removing iron condensates on the surface of ceramic cultural relics and has a light degree of corrosion to the cultural relics themselves.

[0055] In some embodiments, an iron condensate remover and a removal method are provided for use in removing iron condensate from the surface of ceramic cultural relic fragments recovered from the ocean. The iron condensate remover has a mild reaction, high removal efficiency, is safe for the ceramic cultural relic itself, and complies with the principle of minimal intervention in cultural relic protection.

[0056] Embodiment 1:

[0057] An iron coagulant remover having component concentrations of 0.085 mol / L ascorbic acid, 0.065 mol / L glycine, 0.070 mol / L glutamic acid, 0.080 mol / L oxalic acid, 0.34 mol / L sodium chloride, 0.34 mol / L potassium chloride and 0.19 mol / L sodium carbonate was prepared by the aforementioned preparation method, and its pH was 6.5.

[0058] Embodiment 2:

[0059] An iron coagulant remover having component concentrations of 0.050 mol / L ascorbic acid, 0.050 mol / L glycine, 0.050 mol / L glutamic acid, 0.080 mol / L oxalic acid, 0.34 mol / L sodium chloride, 0.34 mol / L potassium chloride and 0.19 mol / L sodium carbonate was prepared by the aforementioned preparation method, and its pH was 6.8.

[0060] Embodiment 3:

[0061] An iron coagulant remover having component concentrations of 0.085 mol / L ascorbic acid, 0.065 mol / L glycine, 0.070 mol / L glutamic acid, 0.050 mol / L oxalic acid, 0.34 mol / L sodium chloride, 0.34 mol / L potassium chloride and 0.13 mol / L sodium carbonate was prepared by the aforementioned preparation method, and its pH was 6.8.

[0062] Embodiment 4:

[0063] An iron coagulant remover having component concentrations of 0.085 mol / L ascorbic acid, 0.065 mol / L glycine, 0.070 mol / L glutamic acid, 0.080 mol / L oxalic acid, 0.1 mol / L sodium chloride, 0.1 mol / L potassium chloride and 0.19 mol / L sodium carbonate was prepared by the aforementioned preparation method, and its pH was 6.5.

[0064] Embodiment 5:

[0065] An iron coagulant remover having component concentrations of 0.085 mol / L ascorbic acid, 0.065 mol / L glycine, 0.070 mol / L glutamic acid, 0.1 mol / L oxalic acid, 0.34 mol / L sodium chloride, 0.34 mol / L potassium chloride and 0.1 mol / L sodium carbonate was prepared by the aforementioned preparation method, and its pH was 3.0.

[0066] Comparative Example 1:

[0067] A hydrochloric acid aqueous solution used for cleaning surrounding condensates in the field of ceramic cultural relics protection research was selected as an iron condensate remover, with a composition of 0.1 mol / L hydrochloric acid and a pH of 1.0.

[0068] Comparative Example 2:

[0069] A citric acid aqueous solution used for cleaning surrounding condensates in the field of ceramic cultural relics protection research was selected as an iron condensate remover. The composition was 0.1 mol / L citric acid aqueous solution, and its pH was 2.0.

[0070] Comparative Example 3:

[0071] An EDTA-2Na aqueous solution used for cleaning surrounding condensates in the field of ceramic cultural relics protection research was selected as an iron condensate remover, with a composition of 0.3 mol / L EDTA-2Na and a pH of 4.7.

[0072] The iron condensate removers of Examples 1 to 5 and the chemical reagents commonly used in the study of condensate removal on the surface of ceramic cultural relics of Comparative Examples 1 to 3 were subjected to multiple iron condensate removal rate and 7-day immersion mass loss rate tests according to the aforementioned method. The average values ​​of the 24-hour iron condensate removal rate R and the 7-day mass loss rate W measured for each example and comparative example are shown in Table 1.

[0073] Table 1 Comparison of iron condensate removal rate and mass loss rate after immersion for 7 days in different embodiments and comparative examples

[0074] Iron condensate remover pH Iron condensate removal rate R Mass loss rate after 7 days of immersion W Example 1 6.5 97％ 0 Example 2 6.8 93％ 0 Example 3 6.8 88％ 0 Example 4 6.5 79％ 0 Example 5 3.0 99％ 0.003％ Comparative Example 1 1.0 12％ 0.023％ Comparative Example 2 2.0 12％ 0.012％ Comparative Example 3 4.7 18％ 0

[0075] As shown in Table 1, the iron condensate removers of Examples 1-5 of the present invention have a better removal effect on the iron condensate on the surface of ceramic cultural relics recovered from the ocean, and can ensure the safety of the ceramic cultural relics during the removal of the iron condensate. In general, within the concentration range defined by the present invention, the higher the concentrations of ascorbic acid, glycine, glutamic acid, oxalic acid, sodium chloride and potassium chloride, the higher the removal efficiency of the iron condensate remover. The pH of the iron condensate remover has no obvious effect on the removal effect, but a lower pH may cause corrosion of the ceramic cultural relics.

[0076] Considering that there is no effective iron condensate remover in the current field, dilute hydrochloric acid, citric acid and EDTA-2Na, three chemical reagents commonly used in the study of cleaning condensate on the surface of ceramic cultural relics, were used as comparative examples to compare the removal effects. Figure 1 As shown, after being treated by Example 1 of the present invention, the reddish-brown iron condensate on the surface of the water-exited ceramic cultural relic fragments is almost invisible, while the iron condensate on the surface of the water-exited ceramic cultural relic fragments treated by Comparative Examples 1 to 3 is still obvious. In addition, the 24-hour iron condensate removal rate of Comparative Examples 1 to 3 is only 12%-18%, among which, Comparative Examples 1 and Comparative Examples 2 will cause obvious damage to the cultural relic body due to the low pH, and the 7-day immersion mass loss rate of the simulated ceramic cultural relic sample can reach 0.023%.

[0077] The above is a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. The above embodiments of the present invention may also be modified in various ways. That is, any simple equivalent changes and modifications made according to the application claims and the contents of the specification of the present invention fall within the protection scope of the claims of the present invention. The technical contents not described in detail in the present invention are common knowledge of those skilled in the art.

Claims

1. A remover for iron condensates in ceramic cultural relics recovered from the ocean, characterized in that: It is mainly composed of natural organic compounds such as glutamic acid, glycine, ascorbic acid and oxalic acid, and common inorganic salts such as potassium chloride, sodium chloride and sodium carbonate.

2. The remover according to claim 1, characterized in that The iron condensate remover includes components with the following concentrations: 0.05-0.1 mol / L ascorbic acid, 0.05-0.1 mol / L glycine, 0.05-0.1 mol / L glutamic acid, 0.05-0.1 mol / L oxalic acid, 0.1-0.5 mol / L sodium chloride, 0.1-0.5 mol / L potassium chloride and 0.1-0.2 mol / L sodium carbonate, and the pH value of the iron condensate remover is 6-7.

3. The remover according to claim 2, characterized in that The iron condensate remover includes components with the following concentrations: 0.085 mol / L ascorbic acid, 0.065 mol / L glycine, 0.070 mol / L glutamic acid, 0.080 mol / L oxalic acid, 0.34 mol / L sodium chloride, 0.34 mol / L potassium chloride and 0.19 mol / L sodium carbonate.

4. The method for preparing a remover according to any one of claims 1 to 3, characterized in that: The preparation method comprises: Step A: adding ascorbic acid, glycine, glutamic acid, oxalic acid, potassium chloride and sodium chloride into deionized water, and ultrasonically dispersing to form a remover stock solution; Step B: adding sodium carbonate to deionized water and ultrasonically dispersing the mixture to form a pH regulating solution; Step C: The remover stock solution and the pH adjusting solution are mixed in a certain proportion, and the pH value is adjusted to 6-7 to obtain the iron condensate remover.

5. The preparation method according to claim 4, characterized in that: The mixing ratio of the remover stock solution and the pH adjusting solution is 1:0.9-1.1, preferably 1:

1.

6. The preparation method according to claim 5, characterized in that: The remover stock solution includes components with the following concentrations: 0.17 mol / L ascorbic acid, 0.13 mol / L glycine, 0.14 mol / L glutamic acid, 0.16 mol / L oxalic acid, 0.68 mol / L sodium chloride, and 0.68 mol / L potassium chloride.

7. The preparation method according to claim 5, characterized in that: The pH regulating liquid is a sodium carbonate aqueous solution with a concentration of 0.38 mol / L.

8. Use of the remover according to any one of claims 1 to 3 in safely removing iron condensates on the surface of ceramic cultural relics recovered from the ocean, characterized in that: The steps include: Step A: Characterization and analysis of iron condensates in marine ceramic artifacts and assessment of their preservation status; Step B: using the iron condensate remover as described in the first aspect above to remove the iron condensate on the surface of the ceramic cultural relics recovered from the ocean; Step C: cleaning and removing residual reagents from the ceramic artifacts recovered from the ocean after the iron condensate is removed; Step D: Evaluate the removal of iron condensate.

9. Use of the remover prepared by the preparation method according to any one of claims 4 to 7 in safely removing iron condensates on the surface of ceramic cultural relics recovered from the ocean, characterized in that: The steps include: Step A: Characterization and analysis of iron condensates in marine ceramic artifacts and assessment of their preservation status; Step B: using the iron condensate remover as described in the first aspect above to remove the iron condensate on the surface of the ceramic cultural relics recovered from the ocean; Step C: cleaning and removing residual reagents from the ceramic artifacts recovered from the ocean after the iron condensate is removed; Step D: Evaluate the removal of iron condensate.

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