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Tinning will provide resistance to corrosion, and is also frequently applied to the ends of stranded electrical wire. It coats the steel with a thin layer of tin that protects against rust – on tin cans used for food, this layer may only be 0.5mm thick. 

Steel can be tinned by a hot-dipping process, or more commonly through electroplating. Following electroplating, microscopic tin ‘whiskers’ can form on the surface of the metal, which can cause short circuits in electronic components. Also, if tin is not deposited uniformly on the surface, it can affect the finished product quality.

An accurate surface inspection solution can provide confidence that the steel surface is properly prepared for tinning. It can also verify the uniformity of the tinplate coverage and identify any surface defects produced by the tinning process.
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