Device and method for detecting adhesion of galvanized layer on galvanized steel sheet

Abstract

The invention provides a detection device and a detection method of adhesion of galvanized layers of galvanized steel plates. The detection device comprises an electric heating air-blowing drying box, a high temperature-resistant fixer, a bending clamp and sealant. The detection method comprises the following steps: cleaning the surface of a galvanized plate sample and putting the galvanized plate sample under the high temperature-resistant fixer; filling a waist-type hole of the high temperature-resistant fixer with the sealant and enabling the sealant to be in contact adhesion with the galvanized plate sample; putting the sealant-coated galvanized plate sample and the high temperature-resistant fixer into the drying box and roasting; taking the galvanized plate sample and the high temperature-resistant fixer out of the drying box and cooling; bending the galvanized plate sample by using the bending clamp and enabling the sealant to be separated from the galvanized plate sample at the bending position; detecting and determining that the galvanized plate sample is qualified if the sealant-coated position of the galvanized plate sample is free of a zinc layer, and determining that the galvanized plate sample is unqualified if the zinc layer is formed in the sealant-coated position of the galvanized plate sample. The detection device and the detection method are capable of determining whether the adhesion of the zinc layer meets the requirement or not by using the sealant according to the chemical characteristic of adhesion of metal plates, achieving the detection of adhesion of the zinc layers of the galvanized plates and ensuring that the adhesion of the zinc layer of the galvanized plates meets the requirement.

Description

technical field [0001] The invention relates to a galvanized steel sheet adhesion detection device and a detection method, which belong to the technical field of galvanized steel sheet quality detection. Background technique [0002] The car body is mainly stamped from galvanized steel sheets and cold-rolled sheets. If the adhesion of the galvanized layer is not enough, the galvanized layer will fall off, and bubbles and rust will appear on the body, which will affect the service life; however, the detection of the adhesion of the galvanized layer is not available in the industry An authoritative detection method, most of which use gravity hammering and repeated bending to check whether the galvanized layer is peeled off. Since there is no clear quantitative definition of the magnitude of gravity, hammering method, and bending angle, the detection methods of various manufacturers are different. It is concluded that The conclusions are different, and some small and medium-siz...

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Problems solved by technology

[0002] The car body is mainly stamped from galvanized steel sheets and cold-rolled sheets. If the adhesion of the galvanized layer is not enough, the galvanized layer will fall off, and bubbles and rust will appear on the body, which will affect the service life; however, the detection of the adhesion of the galvanized layer is not available in the industry An authoritative detection method, most of which use gravity hammering and repeated bending to check whether the galvanized layer is peeled off. Since there is no clear quantitative definition of the magnitude of gravity, hammering method, and bending angle, the detection methods of various manufacturers are different. It is concluded that The conclusions are different, and some small and medium-sized manufacturing enterprises lack the inspection process of the adhesion of the galvanized layer, and can only remedy it after quality problems occur, and hold raw material manufacturers accountable, and the quality traceability procedure is cumbersome

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