The surface is sprayed hard alloy, but can drop how to return a responsibility? The main hardness is less than.
At present, the domestic desulphurization pump impeller are Cr30, A49, foreign is duplex stainless steel, and a silicon carbide casting impeller abrasion wear with Siccoat most, can also repair materials, repair the good far net impeller.
The impeller can be made of ceramic, stainless steel, cold plated ceramic, or hardened stainless steel.
Spray welding may not work, it will be normal to wear off after a period of time
