Immersion tin bath composition and process for using same

Details Immersion tin bath composition and process for using same Immersion tin bath composition and process for using same

C - Chemistry, Metallurgy

23

C

6/4, 117/77

C23C 18/31 (2006.01) C23C 18/18 (2006.01)

Patent

CA 1037207

ABSTRACT OF THE DISCLOSURE The present invention relates to a novel immersion tin plating bath composition and method of utilizing salt composition in depositing a smooth even metallic tin coating over metallic surfaces. The new plating bath composition comprises a soluble stannous salt, a mineral acid and a wetting agent and for its improved properties further contains at least two sulfur containing compound which nay be organic or non-organic. It is particularly preferred that the sulfur component comprise a mixture of alkali metal polysulfides and at least one other sulfur containing compound.

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