精品国产三级a∨在线欧美-亚洲色图35p-亚洲 国产 韩国 欧美 在线-色偷偷88888欧美精品久久久-天天操综-自拍偷拍小视频

Unlike copper faucets, stainless steel faucets are a type of faucet product with stainless steel as the primary material It is widely believed that stainless steel is a non-toxic material and one of the internationally recognized metal materials that can be implemented into the human body

At present, most failures on the market are made of copper, accounting for up to 95%, while maintaining steel failures account for only about 5% How, with the aging of domestic manufacturers&# 039; Production processes and the incoming health, environmental protection, and practical features of stainless steel failures, they have also been favored by more and more customers in recent years

Taking the 304 stainless steel faucet of the main stream as an example, its trust prevention principle is that alloy elements form a fine oxide film, blocking oxygen touch and continuous oxidation In practical applications, steel that is present to weak corrosive media is commonly referred to as stainless steel, While steel that is present to chemical media corrosion is referred to as acid resistant steel Stainless steel may not necessarily be resistant to chemical corrosion, but acid resistant steel generally has rust resistance The corrosion resistance of stainless steel depends on the alloy elements contained in it Chromium is the fundamental element that makes stainless steel corrosion resistance When the chromium content in the steel reaches about 1.2%, chromium reactions with the oxygen in the corrosive medium to form a thin oxide film on the steel surface, called a passivation film, which is used to range further correction of the steel substrate In addition to chromium, Commonly used alloy elements including nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., to meet the requirements of variable applications for stainless steel arrangement and functionality

Article source: Kaiping faucet http://m.roqiship.com.cn/