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Additive-Effects on the Morphological and Structural Characteristics of Matt Tin Electrodeposits from a Methansulfonate Acid Bath
Abstract:
The methansulfonate acid electrolyte is a new type of plating baths which has some advantages such as friendly to environment, stability and outstanding electrical conductivity. In this work, the effect of three organic additives (nonionic surfactant Triton X-100, a weak organic acid (additive A) and an organic sodium salt (additive B)) in stannous methanesulfonate baths on tin electrodeposits were studied by SEM and XRD. The results show that the Triton X-100 plays an important role in improving the coating qualities and promoting the densification of crystalline structure. Under the synergetic action of additive A and additive B in the presence of Triton X-100 a smooth, fine-grained matt tin coating which has certain preferred orientations of lattice plane, could be obtained on copper substrate.
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11-14
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February 2012
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© 2012 Trans Tech Publications Ltd. All Rights Reserved
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