When brown rust spots appeared on the surface of stainless steel pipes, people were surprised: "Stainless steel does not rust, and rust is not stainless steel. It may be that there is a problem with the steel." In fact, this is a one-sided misconception about the lack of understanding of stainless steel. Stainless steel can also rust under certain conditions.
Stainless steel screws have better characteristics, strong corrosion resistance, high temperature resistance, and strong rust resistance. But it will rust in harsh environments. For example, stainless steel screws are exposed to the sun, wind and rain every day when they are very humid. Over time, some rust will definitely grow. For example, contact with some acid-base chemicals can cause chemical reactions to cause corrosion and rust. There are inherently bad stainless steel screws. For example, products made of stainless steel SUS201 screws used in seawater. Due to long-term soaking, the original SUS201 stainless steel screws are not suitable for use on seawater with strong saltiness. Causes corrosion and rust. For the use of marine products, it is generally recommended to use stainless steel SUS316 screws, because 316 stainless steel screws have better performance such as corrosion.
Stainless steel screws have the ability to resist atmospheric oxidation---that is, non-corrosion, and they also have the ability to corrode in media containing acid, alkali and salt---that is, corrosion resistance. However, the size of its corrosion resistance varies with the chemical composition of the steel itself, the state of addition, the conditions of use and the type of environmental media. Such as 304 steel pipe, in a dry and clean atmosphere, it has absolutely excellent anti-corrosion ability, but if it is moved to the seaside area, it will soon rust in the sea fog containing a lot of salt. The 316 steel pipe performed well. Therefore, it is not any kind of stainless steel, which can resist corrosion and rust in any environment.
浙公网安备 33038102332144号
