Abstract
The process of tin cementation on zinc resulting in the formation of fine grained tin coatings was studied. The influence of the experimental conditions such as Sn(II) concentration, duration of the reaction, solution temperature and pH on the microstructure of the cemented tin films was investigated. The dependence between the experimental conditions and the grain sizes of the deposited tin films was established using the method of the design of experiment. The diminution of Sn(II) concentration, the decrease in temperature and the increase in solution pH were found to promote the deposition of fine grained tin coatings with the grain sizes 0·3–1 μm. The fine granulation of tin films was shown to be insufficient for obtaining coatings suitable for the use as protective and/or intermediate layers on zinc surface. The evolution of hydrogen was found to be the most negative factor deteriorating the quality of coatings owing to the formation of pores.
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