How may magnesium engine parts be cleaned?

How may magnesium engine parts be cleaned?

• A. Soak in a 20 percent caustic soda solution
• B. Spray with MEK
• C. Wipe with a damp cloth
• D. Wash with a commercial solvent, carbonize, and scrape or grit blast

Answer: (D)

Magnesium parts need a cleaning method that removes oils and heavy deposits without attacking the metal. Magnesium is reactive to strong alkaline cleaners, so soaking in a caustic soda solution would corrode the part and produce hazards like hydrogen evolution. A damp cloth is far too mild to remove baked-on carbon or stubborn residues, and while MEK is a powerful solvent, relying on spraying it alone won’t adequately clean or control deposits on engine parts. The best approach uses a commercial solvent to dissolve oils, then carbonize the remaining organic buildup so it can be burned away or loosened, followed by scraping or grit blasting to physically remove the carbonized layer and restore a clean surface. This sequence cleans effectively while minimizing chemical damage to the magnesium.

Magnesium parts need a cleaning method that removes oils and heavy deposits without attacking the metal. Magnesium is reactive to strong alkaline cleaners, so soaking in a caustic soda solution would corrode the part and produce hazards like hydrogen evolution. A damp cloth is far too mild to remove baked-on carbon or stubborn residues, and while MEK is a powerful solvent, relying on spraying it alone won’t adequately clean or control deposits on engine parts. The best approach uses a commercial solvent to dissolve oils, then carbonize the remaining organic buildup so it can be burned away or loosened, followed by scraping or grit blasting to physically remove the carbonized layer and restore a clean surface. This sequence cleans effectively while minimizing chemical damage to the magnesium.