Different finish of screws salt spray test time What is the difference?

The screws salt spray test is to test the rust resistance of the screw. Different screw materials and surface treatments have different salt spray test times. Many customers will ask Shi Shi Tong screw manufacturers when customizing screws. The test of nickel-plated salt spray can be too long, and the test of galvanized salt spray can be long. In response, Shi Shi Tong sorted out the salt spray time of the commonly used surface treatment methods:

★Dacromet surface treatment.

Dacromet surface treatment is also a commonly used treatment method for screws. There are usually two types of plating rust and plating rust. These two kinds of salt spray tests have different lengths. The plating rust can pass 72 hours and the rust can pass 500 hours.. The time difference between the two is very large, and it is necessary to pay attention when customizing non-standard screws.

screws salt spray test

★Dacromet black

Some customers need Dacromet black, Dacromet White rust and Dacrome red rust, the rust salt spray testis different, its surface treatment can pass the 90-hour salt spray test.

★Color zinc

According to the different requirements of the user, some screws need to be plated with colored environmentally friendly zinc, and colored zinc screws can pass 96 hours of salt spray testing.

★Black Zinc

After the screw is plated with black zinc, the salt spray testcan pass 24 hours.

★Nickel plating

Nickel-plated screws will last 48 hours.

The above is what Shi Shi Tong shares today. If you want to know more　screws salt spray test, please contact us: sst@szsst88.com