Surface treatment of studs

Surface treatment is essential for stud bolts, as it ensures their ability to withstand corrosion. There are various types of treatments available, including blackening, oxidation, electroplating, phosphating, and electroless zinc flake coating. However, electroplating is the most commonly used treatment, especially in industries such as aerospace, automobiles, communications, home appliances, instrumentation, and tractors. It is important to note that threaded fasteners require both anti-corrosion and interchangeability abilities. While the former ensures that the fasteners can remain durable in various environments, the latter guarantees that the threads will fit seamlessly with other components. Therefore, it is crucial to develop specialized plating standards that meet both requirements. This way, threaded fasteners can perform efficiently and effectively, ensuring the safety and durability of various structures and machinery.

GB/T5267.1-2002 [Threaded fastener electroplating layer] is an essential standard in the series of national standards for "fastener surface treatment". Within this standard, there are two important guidelines: GB/T5267.1-2002 [fastener electroplating layer] and GB/T5267.2-2002 [Electrolytic zinc flake coating for fasteners]. It's worth noting that this particular standard, GB/T5267.1-2002, holds an equivalent status to the international standard ISO4042; 1999 [Threaded fastener electroplating layer]. Consequently, the previous GB/T5267-1985 [Threaded Fastener Electroplating Coating] standard has been replaced by the current one. Therefore, this revised standard provides industry professionals with more comprehensive and up-to-date guidelines for the electroplating layer of threaded fasteners.