A kind of color-coated board pretreatment film weight determination method

Abstract

The invention relates to a color-coated plate, in particular to a pretreatment method for detecting a color-coated plate. A method for measuring the pretreatment film weight of a color-coated plate, which includes the following steps: a sample sealing step: using a rubber sample dissolving cup with a large inner diameter and a small rubber sample cup to seal the non-measurement surface; the sample stripping step: using hydrochloric acid-hexamethyl Tetraamine corrosion inhibition system, the pretreatment film is peeled off together with the coating, and the substrate itself is not corroded and dissolved at this time; the digestion sample step: use nitric acid and hydrogen peroxide wet digestion to transfer all the components to be measured into the solution to make a test solution; pretreatment film weight measurement steps: use ICP-AES or FAAS method to measure the pretreatment film weight of the color-coated board. The method of the invention is simple and easy to seal the sample, the measurement result is accurate, and the prepared measurement solution can meet the requirements of certain measurement techniques (such as ICP-AES, FAAS, etc.) to measure the weight of the pretreatment film.

Description

technical field [0001] The invention relates to a color-coated board, in particular to a pretreatment method for color-coated board detection. Background technique [0002] The currently commonly used method for measuring the pretreatment film weight of color-coated boards is: use scotch tape to seal the non-measurement surface, dissolve the pre-treatment film on the color-coated board with hydrochloric acid, and then boil it with hydrogen peroxide for 30min to measure the thickness of the pretreatment film. This method has the following defects: the sealing of the sample is complicated, and it is easy to cause the over-corrosion of the sample caused by the penetration of the edge of the non-measurement surface due to improper operation; in the process of pretreatment film thickness peeling, the sample may be over-peeled, causing the substrate to be over-peeled. When the components are dissolved, the measured value of the film weight is high, which affects the measurement ac...

AI Technical Summary

Problems solved by technology

This method has the following defects: the sealing of the sample is more complicated, and it is easy to cause the over-corrosion of the sample due to the penetration of the edge of the non-measurement surface due to improper operation; The ingredients are dissolved, resulting in a high film weight measurement value, which affects the measurement accuracy; because hydrogen peroxide is used as a digestive agent in this method, the digestion capacity is reduced due to the decomposition of hydrogen peroxide during the heating process, and the digestion time becomes longer.

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