Alloying hot galvanizing plating coat analysis method

An analysis method, hot-dip galvanizing technology, applied in the direction of testing metals, material inspection products, etc., can solve problems such as difficulty in separation, large analysis errors, and influence
CN1525167AInactive Publication Date: 2004-09-01BAOSHAN IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BAOSHAN IRON & STEEL CO LTD
Publication Date
2004-09-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method of analyzing hot-dip galvannealed coating, including: use epoxy resin for cold inserting, cutting sample, milling sample, finishing, alcoholizing and use nitric acid mixed solution for etching to obtain a gold-phase sample of the coating, use sodium chloride and white vitriol as electrolyte, adopts constant potential method to determine the texture chart and polarization curve of the coating of the obtained sample, to make qualitative and quantitative analysis on the coating, not only achieving a complete, real and clear texture of the hot-dip galvannealed coating but also effectively and really making qualitative and quantitative analysis on the hot-dip galvannealed coating.
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Description

technical field

[0001] The invention relates to an analysis method of a coating structure, in particular to an analysis method of an alloyed hot-dip galvanized coating. Background technique

[0002] Alloyed galvanized sheet emerged in the 1980s. It is to heat the steel sheet after hot-dip galvanizing, keep it warm for a certain period of time, and form a zinc-iron alloy layer through the mutual diffusion of iron in the substrate and zinc in the coating. The coating structure may consist of η (pure zinc), ζ (FeZn13), δ (FeZn7), Γ (Fe5Zn2) and Γ1 phases from the surface to the inside. The coating has good corrosion resistance, paintability and spot weldability. As a new type of automobile outer panel, it is favored by automobile manufacturers and has broad application prospects.

[0003] Due to the complexity of the coating structure, the analysis of the coating structure is still a hot spot in the study of the relationship between the coating structure, process and performan...

Claims

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