Detection method for authenticating galvanizing method of galvanized steel wire by coating iron content

Abstract

The invention provides a detection method for authenticating a galvanizing method of galvanized steel wires by coating iron content, and is proposed to identify zinc electroplating and hot-dip galvanizing from the galvanizing principle. Electroplating is an electrochemical principle. The coating is a pure galvanized layer with no iron. The hot-dip galvanized coating is divided into two layers, a pure zinc layer and a zinc-iron alloy layer formed by thermal diffusion, so that the iron is present in the coating. A chemical method is established to identify the two according to the different chemical elements in the two coatings. The content of iron in the coating is detected by means of an inductively coupled plasma optical emission spectrometer or an atomic absorption spectrometer accordingto the test method for the specific detection of iron in the coating. The galvanizing method is identified depending on whether iron is detected in the coating or by its range.

Description

Technical field [0001] The invention relates to a galvanizing method, in particular to a method for identifying the galvanizing method of a rope steel wire based on the iron element content of the coating. Background technique [0002] Electro-galvanizing is also called cold galvanizing. It uses electrolysis equipment to degrease and pickle steel and put it into a solution of zinc salt, and connect it to the negative electrode of the electrolysis device. Place a zinc plate on the opposite side of the pipe and connect it to the electrolysis device. The positive pole is connected to the power supply, and the directional movement of the current from the positive pole to the negative pole is used to make Zn in the electrolyte 2+ Under the action of electric potential, nucleation growth is deposited on the substrate to form a galvanized layer, and there is no diffusion process between zinc and iron in this process. So theoretically the coating should be a pure zinc coating without iro...

AI Technical Summary

Problems solved by technology

Sometimes when a hot-dip galvanized steel sheet and an electro-galvanized steel sheet are put together, it is difficult to distinguish which is a hot-dip galvanized steel sheet and which is an electro-galvanized steel sheet. Theoretical roots of the distinction between the two studies

Especially for rope-making electro-galvanized and hot-dip galvanized steel wires, there may be some spangles on the thick diameter steel wires, but the presence or absence of spangles on the surface of the thin steel wires cannot be distinguished from the senses.

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