Tin whiskers aren't the result of lead free solder. They are a result of the tin coating on component leads. If you take a close look at that nasa page you'll s

Tin whiskers aren't the result of lead free solder. They are a result of the tin coating on component leads. If you take a close look at that nasa page you'll see that every photo is of just a component lead/termination. Tin plating has largely been replaced by tin alloys at this point which has more or less solved the whisker issue at a large scale. More info here: https://www.indium.com/blog/pb-free-solders-are-not-the-cause-of-tin-whiskers.php https://www.indium.com/blog/pb-free-solders-are-not-the-caus...