Test knowledge points of alternating salt spray test

Alternating salt spray tests are becoming more and more familiar as people's test requirements increase. Therefore, understanding and learning the alternating salt spray test is an indispensable step. Next, Xiaobian will come up with a few important points for the exchange of salt spray tests.

(1) Is the sample tested immediately after the alternation salt spray test?

A: No, the salt spray test is generally an electronic product. It is necessary to wait for the sample to dry for a period of time before performing the functional test to avoid the sample short-circuit burning machine. Time depends on the characteristics of the sample and is determined by the customer.

(2) What are the differences in the conditions of neutral salt spray, acetate spray, and copper accelerated acetate spray?

Answer: Neutral salt spray test: test chamber temperature 35 °C, solution concentration 5% NaCl (mass percentage), PH value 6.5~7.2 (at 35 °C);

The acetate spray test chamber has a temperature of 35 ° C, a solution concentration of 5% NaCl (mass percent), and a pH of 3.1 to 3.3 (at 35 ° C);

The copper accelerated acetate spray test chamber temperature was 50 ° C, the solution concentration was 5% NaCl (mass percent), the pH was 3.1-3.3 (at 35 ° C), and 0.26 g/L copper chloride was added.

(3) What is the difference between the protection rating and the appearance rating in the salt spray rating?

A: The protection rating indicates the ability of the overlay to protect the base metal from corrosion; the appearance rating is to describe the overall appearance of the specimen, including all defects caused by exposure, and the rating is primarily for protection ratings.