Lead-tin alloy plating is widely used in industrial production. By adjusting the concentration ratio of the two metal ions in the plating solution, various lead-tin alloys with different lead and tin contents can be obtained. Alloy coatings with a tin content of 6% -10% can improve corrosion resistance, weldability and adhesion to coatings, and have excellent lubricating properties; metal coatings containing 15% -25% tin are suitable for surface layers Lubrication, adhesion and soldering; alloy metal coatings containing 45% -55% tin can be used to avoid corrosion by seawater and other media; metal coatings containing 55% -65% tin can improve the welding of the surface of electronic components Sex. Adding 1% to 3% lead in pure tin can prevent the formation of tin whiskers. The content of tin in the lead-tin alloy coating increased with the increase of tin content and current density.。
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