Studs generally need to be surface treated. There are m […]
Studs generally need to be surface treated. There are many types of bolt surface treatments. Electroplating, blackening, oxidation, phosphating, and non-electrolytic zinc coating treatments are commonly used. However, electroplated fasteners account for a large proportion of the actual use of fasteners. Especially in the automotive, tractor, home appliances, instrumentation, aerospace, communications and other industries and fields are more widely used. However, for threaded fasteners, it is not only required to have a certain degree of corrosion resistance in use, but also must ensure the interchangeability of the threads, which may also be referred to herein as screwing. In order to meet the "preservative" and "interchangeable" dual-use properties required for the use of threaded fasteners, it is necessary to develop special plating standards.