Salt spray test of stainless steel fasteners

Without surface treatment: At present, among stainless steel fasteners, according to our experience, taking 304 products as an example, without any surface treatment, the general salt spray test time for stainless steel screws is 48 hours, and the nut is 96 hours. However, affected by the rough surface of the product itself, the possibility of rusting within 48 hours cannot be ruled out.

After Goshen has been treated: At present, the salt spray test time of Goshen products after treatment can reach 1000 hours (except for carriage bolts), and the flat spring washers can reach 500 hours. The actual situation is greatly affected by the surface roughness of the product itself.