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Method and device for measuring corrosion resistance of iron oxide skin of hot rolled plate coil
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A technology of iron oxide scale and hot-rolled coils, which is applied in the direction of length measuring device, metal rolling, metal rolling, etc., can solve the problems of poor reproducibility of results, influence, and human control of the drying degree of rust spots, etc.
Inactive Publication Date: 2019-09-27
SHOUGANG CORPORATION
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Problems solved by technology
[0005] (1) The measurement area has extremely high requirements on the surface state of the sample, and tiny pits and cracks will have a great impact on the experimental results;
[0006] (2) The reproducibility of the results is poor, and a large number of samples need to be measured to obtain a relatively stable data result
[0008] (1) During the experiment, the rust was serious and polluted the environment;
[0009] (2) During the drying process of weight loss measurement, the drying degree of rust spots on the surface of the sample needs to be controlled manually, which is difficult to keep consistent;
[0010] (3) Although it is an accelerated measurement method, its measurement period is 3 to 7 days, which is still relatively long
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Embodiment 1
[0063] Embodiments of the present invention provide a method for measuring the corrosion resistance of hot-rolled coil iron scale, such as figure 1 shown, including:
[0064] S101, Obtain pro-eutectoid Fe in iron oxide scale 3 o 4 The percentage by weight of the phase;
[0065] S102, based on the cross-sectional view of the iron oxide scale, the morphology distribution of the FeO phase in the iron oxide scale is obtained;
[0066] S103, based on proeutectoid Fe 3 o 4 The weight percentage of the phase and the morphology distribution of the FeO phase determine the corrosion resistance of the oxide scale.
[0067] In a preferred embodiment, the phase content (wt / %) in iron oxide scale of different experimental samples can be used to take sample 1 and sample 2 for experimental determination.
[0068] First, according to S101, obtain the pro-eutectoid Fe in the iron oxide scale of the two samples 3 o 4 The percentage by weight of the phase.
[0069] Specifically, it inclu...
Embodiment 2
[0097] Based on the same inventive concept, such as Figure 5 As shown, the embodiment of the present invention also provides a device for measuring the corrosion resistance of iron oxide scale of hot-rolled coils, including:
[0098] Obtaining module 501, for obtaining the proeutectoid Fe in iron oxide scale 3 o 4 The percentage by weight of the phase;
[0099] An obtaining module 502, configured to obtain the morphology distribution of the FeO phase in the iron oxide scale based on the cross-sectional view of the iron oxide scale;
[0100] Determination module 503, for based on the proeutectoid Fe 3 o 4 The weight percentage of the phase and the morphology distribution of the FeO phase determine the corrosion resistance of the iron oxide scale.
[0101] Preferably, the obtaining module 502 specifically includes:
[0102] a first obtaining unit, configured to obtain a cross-sectional view of the iron oxide scale;
[0103] A judging unit, configured to judge whether eac...
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Abstract
The invention relates to the technical field of metal surface coated layer measurement, and in particular relates to a method and device for measuring the corrosion resistance of an iron oxideskin of a hot rolled plate coil. The method for measuring the corrosion resistance of the iron oxideskin of the hot rolled plate coil comprises the following steps of obtaining the percentage content of the weight of a proeutectoid Fe3O4 phase in an iron oxideskin; according to the cross section of the iron oxide skin, obtaining the morphology distribution condition of a FeO phase in the iron oxide skin; and according to the percentage content of the weight of the proeutectoid Fe3O4 phase and the morphology distribution condition of the FeO phase, determining the corrosion resistance of the iron oxide skin. According to the method, the operation is simple, furthermore, the measurement period is short, and the stability is high.
Description
technical field [0001] The invention relates to the technical field of metalsurface coating and coating measurement, in particular to a method and a device for measuring the corrosion resistance of hot-rolled coil iron oxide scales. Background technique [0002] During the rolling process of hot-rolled substrates, the iron on the surface contacts with oxygen in the air to form an oxide layer of several microns to tens of microns, which is called iron oxide scale. Iron oxide scale protects the iron matrix during storage and transportation. The strength of its corrosion resistance will change the surface state of the iron matrix and the user's pretreatment process, and ultimately affect the processing and manufacturing costs of steel products. Therefore, exploring the measurement method of scale corrosion resistance and realizing the qualitative analysis of scale corrosion resistance will help to adjust and improve the rolling process, and improve the corrosion resistance of ...
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