Paint foaming test method

Abstract

The invention discloses a paint foaming test method. The method includes the following steps: polishing an electrophoresed sample to form a polishing pattern on the sample; washing and drying the polished sample; preparing a foaming test solution and applying the foaming test solution to the sample, wherein the foaming test solution is artificial sweat; drying the sample to allow components of thefoaming test solution to be adhered to the polishing pattern; spraying and drying a floating coat, a colored paint and a varnish on the sample sequentially, wherein the floating coat, the colored paint and the varnish all cover the polishing pattern; baking the painted sample for first time; placing the baked sample in a constant temperature and humidity environment for second time; checking blistering of the paint on the sample. According to the test method, the salt tolerance of the paint is tested, and the probability of paint blistering is reduced by selecting the paint with high salt tolerance. Even if a small amount of salt is mixed in the production process, the paint with high salt tolerance can still avoid large area paint blistering.

Description

technical field [0001] The invention relates to the field of automobile manufacturing, more specifically, to the testing technology for paint spraying quality in the automobile manufacturing process. Background technique [0002] In the process of automobile manufacturing, unexpected and unpredictable defects are often encountered. For example, on a certain model, there is a group of defects of paint blistering at specific positions. [0003] Taking a certain car model as an example, mass-produced cars will have mass-produced paint blisters. The area of ​​the blister defect is large, which seriously affects the appearance of the vehicle and requires rework and re-spraying, which greatly affects the effectiveness of the vehicle and greatly affects the vehicle’s effectiveness. Increased production costs. Moreover, there is a certain delay in the blistering defect, and there is also a risk that the defect will appear after sale and cause a greater impact. [0004] This kind ...

AI Technical Summary

Problems solved by technology

[0003] Taking a certain car model as an example, mass-produced cars will have mass-produced paint blisters. The area of ​​the blister defect is large, which seriously affects the appearance of the vehicle and requires rework and re-spraying, which greatly affects the effectiveness of the vehicle and greatly affects the vehicle’s effectiveness. increased production costs

Moreover, there is a certain delay in the blistering defect, and there is also a risk that the defect will appear after sale and cause a greater impact

[0004] This kind of paint surface blistering defect is relatively rare. After consulting the data, no records of similar defects and corresponding treatment methods have been found. Therefore, this problem has brought great troubles to the production of vehicles.

Images