Abstract
A study of electroless nickel-tin-phosphorus alloy plating from acidic bath has been made with reference to the effect of tin content on the deposition condition and the corrosion behavior of the alloy. It was found that the tin content in the deposits increased up to 2.8% and the deposition rate decreased with increasing amount of stannic chloride in the bath. Also, the grain size of the nickel deposits obtained was found to become smaller with increasing tin content. The corrosion resistance of the nickel-tin-phosphorus deposits in IN sulfuric acid was enhanced by increasing tin content in the deposits. Nickel-tin-phosphorus deposits obtained from the acid type bath was found to be more stable than that obtained from the ammonia alkaline bath.
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