Salt Spray Test Standard
In the salt spray test chamber, the salt spray test is performed. It is typically used to test the metals' corrosion resistance or the corrosion resistance of electroplated metal surfaces. Spraying corrosive salt solutions can be used to conduct corrosion tests. The test is conducted using gas, and several corrosion techniques are employed depending on the particular use environment. There are essentially a set of test standards and test rating judgments when doing the salt spray test. There are four major ways to determine the salt spray test's corrosion condition. Evaluation, evaluation methods, evaluation of corrosion appearance, and evaluation of corrosion data statistical analysis. The statistical analysis of the corrosion data method offers techniques for creating corrosion tests, assessing corrosion data, and estimating the degree of trust in corrosion data. It is mostly used for corrosion analysis and statistics, not for evaluating the quality of a particular product.
Ten levels make up the salt spray test standard, which is based on the enterprise test standard as a guide and corresponds to the actual situation.
Grade 10: No areas of flaws, an A for appearance, and no modification to the sample's surface look;
Level 9: The sample's surface has a mild to moderate amount of discoloration, the proportion of the defect area is less than 1%, and the appearance rating is B;
Grade 8: The sample surface is significantly discolored or there is very mild corrosion, the appearance grading is C, and the fraction of the defect area is between 0.1% and 0.25%; Grade 7: The percentage of the fault area ranges from 0.25 to 0.5%, the appearance rating is D, and the test for severe light loss on the sample's surface reveals hardly any corrosion products;
Level 6: Defect area accounts for 0.5%–1.0% of the sample's total surface area, appearance rating E, significant gloss loss, or a thin layer of corrosion products or pitting;
Level 5: The fault area is 1.0% to 2.5%, the sample's surface has corrosion products or pitting, at least one of which is dispersed across its whole surface, and the appearance rating is F;
Level 4: There is a thick corrosion product layer or pitting corrosion on the sample's surface, the appearance rating is G, and the defect area makes up 2.5%–5% of the total defect area;
Level 3: There is severe pitting, a very thick corrosion product layer, and an appearance rating of H. The fault region accounts for 5%–10% of the sample.
Level 2: The sample has corrosion of the base metal, the defect area ranges from 10% to 25%, and the appearance rating is 1.
Level 1: A major corrosion occurrence, the fault region accounts for 25% to 50% of the corrosion.
