1. "Micro Cooling Fan" impeller corrosion and wear resistant materials selection
Austenitic stainless steel (eg 1Cr18Ni9Ti) yield strength is low, not suitable for the manufacture of high speed impeller, suitable for low-speed fan as a general antiseptic impeller materials. CO2 contained in the gases and fumes and other corrosive media type of stainless steel is mainly used Cr13, it should be noted that stress corrosion, and the corrosion resistance is required
Strong high speed fan impeller marten stic precipitation is widely used stainless steel, such as 0Cr17Ni4Cu4Nb and FV520B so on.
2 "Micro Cooling Fan" impeller corrosion layer
Amorphous nickel - phosphorus (Ni-P) alloy is relatively successful in recent years, a method of anti-corrosion surface coating. Because of the ideal characteristics of amorphous alloys and coatings to prevent corrosion of the grain boundary and grain boundary defects, coating hardness of Ni-P alloy plating HRC50 ~ 70 corrosion, abrasion and of hydrochloric acid, sulfuric acid, phosphoric acid and caustic soda the corrosion resistance.
Fan impeller surface coating of amorphous nickel - phosphorous (Ni-P) alloy as a good resistance to corrosion process methods, our company has successfully used on Iron and Steel Company and Wuhan Iron and Steel Company of fans, to good effect.
3 Spray "Micro Cooling Fan" impeller corrosion layer
Fan impeller corrosion resistance and thermal spray coating has a surface plasma spraying. Spray material nickel and nickel alloy wire, powder; stainless steel wire, powder. Nickel and nickel alloy coating layer of hydrogen sulfuric acid, phosphoric acid, hydrogen cyanide acid, hydro fluoric acid, acetic acid, ferrous sulfate solution and drying gas and other media, good corrosion resistance, but the hydro chloric acid, acid, potassium acetate, sulfite and other media, corrosion resistance is good.
Austemitic stainless steel is used in many thermal spray, such as 1Cr18Ni9Ti, has good manufactur ability, better corrosion resistance in oxidizing media, and most of the reduction of certain media.