Reasons for oxidative corrosion of astm a192 high pressure boiler tubes

Speaking of steel pipe materials, and now professional manufacturers of steel pipe manufacturers in the product quality requirements are constantly improving, but some of the necessary wear and tear is indispensable. Sometimes there will be oxidative corrosion now, what is the cause of it?

The reason for the corrosion of the vibration is that the vibration effect breaks down the protective film of the astm a192 high pressure boiler tubes, the rapid oxidation of the bare metal, the abrasion and oxidation are repeated, and the damage is exacerbated. In addition, the astm a192 high pressure boiler tubes metal surface due to pressure generated by cold welding or melting, followed by relative movement of metal particles fall off, and rapid oxidation. Both produce oxidized rust particles that destroy the metal interface. Oxygen is very important in the vibration corrosion, but also some vibration corrosion does not require oxygen. ASTM a192 high pressure boiler tubes protection method can be applied in the contact surface grease, can reduce the friction, and remove oxygen, if the surface at the same time more effective phosphating. Can also use carbide, shot peening or cold processing to improve the surface hardness and so on.