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Effect of Environmental Conditions on Tin (Sn) Whisker Growth
Mechanical Engineering Department, College of Engineering, Tuskegee University, Tuskegee, USA
Mechanical Engineering Department, College of Engineering, Tuskegee University, Tuskegee, USA
Mechanical Engineering Department, College of Engineering, Tuskegee University, Tuskegee, USA
The Boeing Company, St. Louis, USA
- 1 Mechanical Engineering Department, College of Engineering, Tuskegee University, Tuskegee, USA
- 2 Mechanical Engineering Department, College of Engineering, Tuskegee University, Tuskegee, USA
- 3 Mechanical Engineering Department, College of Engineering, Tuskegee University, Tuskegee, USA
- 4 The Boeing Company, St. Louis, USA
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Abstract
This research focuses on tin whisker growth under two different environmental conditions namely hygrothermal and a salt solution. Tin coated brass coupons were used for this study to analyze the growth of tin whiskers over time. Their growth rates were examined periodically using optical and scanning electron microscopy. The physical characteristics of the tin whiskers were identified for each environmental condition. It was discovered that submersion of tin coated brass substrates in 5% salt solution considerably increased the density (number of whiskers per unit area), and the length of the whiskers. In addition, it was found that the geometry and aspect ratio of tin whiskers were different for each environment.
KeywordsTin WhiskerEnvironmental ConditionsTin Coated Brass CouponsWhisker GrowthCorrosion
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