How does black oxide inhibit corrosion?
Black oxide, in and of itself, provides very minimal protection from corrosion. The corrosion resistance is, for the most part, dependant upon the sealer used in the final step of the process. All sealants (at least the ones that we use) are non-toxic. A process known as Salt Spray Test, which is a controlled analysis of resistance to rust when the sample is subjected to hours of continuous salt spray, generally determines corrosion resistance. The sample is monitored, and the test is ended when the first sign of rust appears. Common sealants have a corrosion resistance range from as little as eight hours to as much as two hundred fifty hours, and individual customer requirements determine which sealant would be used. Generally, the thinner, Dry-to-Touch sealants provide the least protection, while the thicker, heavier-coating sealants provide the most protection. In addition, various sealants may require additional steps, such as spin-drying, in order to be used. To put these Salt Spr
