Which statement is true regarding corrosion removal on magnesium alloys?

Which statement is true regarding corrosion removal on magnesium alloys?

• A. Corrosion should not be removed with metallic tools
• B. Chromic acid is used for titanium
• C. Prepsol is used to clean magnesium corrosion
• D. Stainless steel wiping is sufficient

Answer: (A)

Corrosion removal on magnesium alloys must avoid metallic tools because magnesium is very soft and the protective oxide film is easily damaged. Using metal implements can scratch or gouge the surface, remove the protective layer, and create rough areas that promote further corrosion. It can also leave metal particles that form galvanic couples with magnesium, accelerating corrosion at the treated site. The safe approach uses non-metallic tools—like nylon brushes or plastic scrapers—and approved cleaners or inhibitors that are compatible with magnesium. The other statements aren’t correct for typical magnesium corrosion removal practices: chromic acid isn’t a standard treatment for titanium, Prepsol is a general cleaner rather than a dedicated magnesium corrosion remover, and stainless steel wiping can scratch or contaminate the surface rather than effectively cleaning it.

Corrosion removal on magnesium alloys must avoid metallic tools because magnesium is very soft and the protective oxide film is easily damaged. Using metal implements can scratch or gouge the surface, remove the protective layer, and create rough areas that promote further corrosion. It can also leave metal particles that form galvanic couples with magnesium, accelerating corrosion at the treated site. The safe approach uses non-metallic tools—like nylon brushes or plastic scrapers—and approved cleaners or inhibitors that are compatible with magnesium. The other statements aren’t correct for typical magnesium corrosion removal practices: chromic acid isn’t a standard treatment for titanium, Prepsol is a general cleaner rather than a dedicated magnesium corrosion remover, and stainless steel wiping can scratch or contaminate the surface rather than effectively cleaning it.