抄録
A study has been made of the effect of tin and phosphorus content of the bath on the properties of electroless nickel-tin-phosphorus alloy deposits obtained from ammonia alkaline bath. The alloy deposits containing up to 1.0% tin and 3.4-5.4% phosphorus can be obtained by an addition of sodium stannate to the plating bath. The deposition rate of the alloy containing 0.25% tin was the lowest, because tin reacted as an inhibitor on the nickel surface. It was also found that the corrosion resistance of the nickel-tin-phosphorus deposit containing 0.46% tin and 3.97% phosphorus was most enhanced in 1N sulfuric acid by the presence of tin and phosphorus.
