The effect of benzoic acid on the corrosion and stabilisation of electrodeposited copper powder
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One of the main concerns in the production of electrolytic copper powder is stabilisation. Nonstabilised powder has a large surface area exposed to the effects of oxygen and moisture from the air. This leads to oxidation and formation of corrosion products on the grain surface and, in this way, the powder becomes unsuitable for sintering. Stabilisation is mostly obtained by interaction between the clean surface of the electrodeposited copper powder and a solution of an active substance, which inhibits the corrosion of copper powders. This work describes the stabilisation of copper powders using a new method. The oxygen content, moisture content, and corrosion resistance of the stabilised electrolytic copper powder were determined. These values are compared with the corresponding values of other corrosion inhibitors of copper powder.
Keywords:Electrolytic copper powder / Stabilisation / Corrosion / Benzoic acid
Source:Hydrometallurgy, 2004, 73, 1-2, 155-162
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