Method of electrochemical obtaining of bright tin coatings
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United States of America Patent
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Jun 8, 1982
Issued Date -
N/A
app pub date -
Jan 22, 1981
filing date -
Jan 11, 1979
priority date (Note) -
Expired
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Abstract
In a method for the electrodeposition of bright tin coatings by the use of an electroplating bath comprising a solution of stannous sulfate and sulfuric acid, the improvement which comprises adding to the bath an alcoholic solution containing from 14 to 30 percent by weight of a surface active agent, from 0.5 to 5 percent by weight of an unsaturated carbonyl compound containing an aryl group, from 1.0 to 10.0 percent by weight of the product of transesterification of a natural fat, and at least one of the following ingredients: from 0 to 8 percent by weight of an ester of an unsaturated acid and from 0 to 15 percent by weight of compound containing an ether group, the said solution being added to the bath in the ratio of 1 part of solution to 20 to 35 parts by weight of the bath.
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