Influence of Ni and Cr on Anti-corrosion Performance of Tungsten Carbide Base Hard Alloy

By using the methods of weight loss,electrochemical testing,mechanical property testing and morphology analysis,the corrosion behavior of WC-(7~10) Ni-(1~2) Cr alloys was studied in 10% (volume ratio) dilute sulphuric acid,10% dilute hydrochloric acid and 10% dilute HNO3 solution respectively,and compared with that of traditional WC-8Co and WC-13Co hard alloys.The results indicated that the bending strength and hardness of WC-(7~10) Ni-(1~2) Cr were lower than those of WC-8Co and WC-13Co hard alloys slightly.In the immersion corrosion testing and electrochemical experiment,those of WC-Ni-Cr the anti-corrosion ability alloy surpassed those of traditional WC-Co alloys obviously,indicating that the WC-Ni-Cr alloy had stronger corrosion resistance.good application prospect in petro-chemical industry,environmental protection and food industry as wear resistant and anti-corrosive material.