Common platings and coatings for fasteners and how they perform
Working with metals always involves considerations regarding the risk of corrosion, and possible solutions for managing it satisfactorily.
For fasteners, a wide range of materials are available for use in various environments, and many more types of platings and coatings are available as finishes where needed. The right solution for any situation is ultimately defined by technical and economic considerations, and there is no solution which fits every situation.
The vast majority of fasteners supplied in the world market are made from carbon steel. Carbon steel is a popular choice due to its high strength and load-bearing capability. It can be cold-formed and machined with relatively little effort, and tight tolerances can be met. Heat treatment to enhance the structural properties of the steel works very effectively. Carbon steel is also an economical choice.
Various finishes are suitable for carbon steel fasteners. However, the two most widespread technologies for finishes are:
- Zinc flake coating