Method for testing anti-discoloration protection effect of high-temperature-resistant coating on stainless steel surface

Abstract

The invention discloses a method for testing an anti-discoloration protection effect of a high-temperature-resistant coating on the surface of stainless steel. The method is characterized by comprising the following steps: 1) clamping a stainless steel plate to be tested; 2) at room temperature, turning on a light source and a photoelectric detection probe on two sides of the to-be-detected stainless steel plate, and recording optical signal values A1 and B1 of the upper and lower surfaces of the to-be-detected stainless steel plate; 3) starting a heating device and a temperature measuring probe, and keeping for time t when a preset heating temperature value T is reached; 4) opening an exhaust heat dissipation system, opening a light source and a photoelectric detection probe after the temperature value is reduced to room temperature, and recording optical signal values A2 and B2 of the upper and lower surfaces of the stainless steel plate to be detected; and 5) calculating a Z value:Z = (B2 / B1) / (A2 / A1) and outputting the Z value. The method has the advantages that a quantitative test result can be directly obtained by the test method, and the stability of the test result is ensured, and the influence of color difference factors possibly existing before baking of different stainless steel surfaces is considered, so that the test result is more accurate and reliable, and has better credibility.

Description

technical field [0001] The invention relates to a method for testing the anti-tarnish protection effect of a high-temperature-resistant coating on a stainless steel surface. Background technique [0002] Discoloration of stainless steel is a common phenomenon in the field of food processing. If stainless steel is used as the inner container material in the oven, when heated, the stainless steel inner container will be subjected to a temperature environment above 200 degrees for a long time, and yellowing will appear. [0003] The color formed on the surface of stainless steel is mainly related to several factors related to the oxidation resistance of stainless steel: 1. The composition of steel, chromium content is an important component that affects the oxidation resistance. The higher the chromium content, the better the anti-oxidation performance and the slower the discoloration; 2. The temperature, the higher the temperature, the darker the color; 3. The air and oxygen c...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method for testing the anti-tarnish protection effect of high-temperature-resistant coatings on stainless steel surfaces, which is simple and easy to operate and has high stability and reliability of test results.

Images