Salt Spray Testing on Magnesium Alloy Coated Steel Salt Spray Testing on Sun Action Trackers' Magnesium Alloy coated steel products. Salt Spray Testing on Sun Action Trackers’ Magnesium Alloy coated steel products. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to print (Opens in new window)Click to email this to a friend (Opens in new window)