Cavitation key to new surface coating method for lightweight low density magnesium alloys, improving corrosion resistance.

https://www.eurekalert.org/news-releases/1086209

"no: costly, unwieldy, slower coating under vacuum... liquid-based chemical conversion coating with cavitation bubbles... corrosion resistance to chlorides (salt)/ undesirable mechanical properties...  jets of bubbles fired at surfaces/ same jets exposed to ultrasound waves... subsequent cavitation collapse forms thick, even magnesium phosphate films... reinforcing lightweight materials in EVs"