Factors affecting the protection effectiveness of OSP when applied to tinplate
[Introduction]The protection effectiveness of organic solderability preservative(OSP)on tinplate under different conditions was studied with a commercially available OSP.[Method]The effects of substrate material,introduction of nickel intermediate layer with different thickness,and thickness of different kinds of tin coatings on the protection effectiveness of OSP were studied by neutral salt spray test,dry and wet aging tests,and solderability test.[Result]The OSP showed the best protection effectiveness on the tinplate using tin-copper alloy as substrate,nickel coating with a thickness of 1-2 μm as intermediate layer,and matte tin coating with a thickness of 2-3 μm as outer layer.[Conclusion]The results of this paper can provide experimental data and guidance for companies to select suitable protection technology of tinplate.
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