A mixed nitric-sulphuricacids is used to recover the valuable metals ni, Cu and co from low-grade Ni-Cu sulfide tailings, the leaching rate of ni, Cu, and co is 91.
Excellent intergranular corrosion resistant properties, suitable to manufacture the equipment which resist to sulphuricacids, phosphonic acids, formic acids and acetic acids.
用于抗盐酸、磷酸、甲酸、乙酸的设备,有良好的耐晶间腐蚀性。
3
The effect of some common carboxylic acids as well as sulphuric acid concentration on thickness and hardness of medium temperature anodizing film of Al alloy was investigated.