Subconsciously, we all think that stainless steel screw is not rusty, actually otherwise, in harsh environments, as will appear after corrosion rust stainless steel screw, so the rust is also a kind of more common conditions, only when we use stainless steel screws, mostly used in indoor or on some electrical equipment used, its work environment is good, there is no water and air pollution, acid rust probability is low, so see rusty phenomenon will be less.
stainless steel bolt will rust because the protective film of stainless steel received damage?The stainless steel bolt encountered water that condensed in the air.Contamination means they contain large amounts of sulfides or carbon monoxide.When they come into contact with water, they form sulfuric acid and hydroxides, which chemically corrode the stainless steel bolts.
I found that many friends on the network are very concerned about what is the self-tapping screw, the difference between the self-tapping screw and the general screw is that the general screw must have a good processing screw hole to screw in. Self-tapping screws do not need, in the screw-in at the same time their own tapping. In order to achieve its own tapping purpose, the hexagonal drill screws are generally pointed, for easy to squeeze into the object to be screwed in.
Generally refers to pointed, coarse-toothed, hard-textured wood screws, but also aluminum alloy and plastic. A special self-tapping screw used to thread metal holes is called a tap. Self-tapping screws are used for non-metallic or soft metals, and do not need to drill and tap; self-tapping screws are pointed, so that they can "self-tapping"; ordinary screws are flat-headed and have the same thickness.
Stainless steel generally refers to steel that has the ability to resist corrosion by air, water, acid, alkali salt or other media.The production fasteners are mainly austenitic stainless steel. In people's daily life, the stainless steel that is often referred to is also austenitic stainless steel.