All metals additionally, the reaction of oxygen within the atmosphere, seamless stainless steel pipe the finish oxide film. Unfortunately, ordinary metal pipe while in the formation of iron oxide with a oxidation continues, the rust consistently expand, eventually forming holes. You need to use paint or oxidation-resistant metal (eg, zinc, nickel and chromium) plating so that the carbon steel surface, but, as people know, this protection is just a film. Generally if the protective layer is damaged, the next steel started to rust.
Chrome steel pipe depends on the corrosion resistance of chromium, but because chromium is an element of steel, as a result strategy for protection is distinct.
Add in the volume of chromium reached 10.5%,pipes the atmospheric corrosion resistant steel more than doubled, but higher chromium content, although still improve corrosion resistance, except for obvious. Because chromium is alloying of steel processing, the oxide is the type of change is becoming pure chromium metal oxides formed at first. This tight adhesion of a chromium-rich oxide surface protection to protect yourself from further oxidation. This thin oxide layer, through which you will realise the surface of the natural sheen of steel, the chrome steel possesses a unique surface. Moreover, when the damaged surface, the exposed steel surface and also atmospheric step to self-repair, re-formation associated with the "passive film", continues to be play a protective role.
Therefore, all s / s have a very good common characteristic, namely chromium content of 10.5% or.
And building construction applications, the steel pipe types are commonly only six. They contain 17 to 22% of chromium, a fantastic steel also contains nickel. Molybdenum may be offered with further improve the atmospheric corrosion, stainless steel pipes particularly corrosion capacity chloride-containing atmosphere.