Precision parts—whether used in aerospace, medical devices, or high-performance machinery—require demanding care. Even minor corrosion can compromise tolerances, reduce lifespan, or lead to costly downtime. Effective corrosion prevention combines science, process, and the right products.
Understanding Corrosion
Corrosion is an electrochemical process where metals deteriorate when exposed to moisture, oxygen, salts, acids, or other contaminants.
In simple terms:
- Anodic reaction: Metal atoms lose electrons and form ions.
- Cathodic reaction: Oxygen or hydrogen gains electrons, often forming oxides or hydroxides.
Certain contaminants accelerate corrosion:
- Salts (e.g., chlorides):
- Break protective oxide layers → localized pitting.
- Oils and machining fluids:
- Trap moisture and promote uneven corrosion.
- Acidic residues:
- Lower pH → faster metal dissolution.
Even small spots of corrosion can compromise tolerance, fit, and finish, making prevention essential.
Step 1: Clean – Removing Contaminants
Cleaning is the foundation of corrosion prevention.
Best practices:
- Degreasing:
- Remove oils/lubricants.
- Ultrasonic cleaning
- Dislodges tiny particles.
- Deionized water rinse:
- Removes ionic residues.
Step 2: Protect – Applying Corrosion Barriers
Protect parts from moisture and oxygen:
- Temporary inhibitors:
- Thin films or vapor-phase inhibitors.
- Acid treatments create stable oxide layers.
- Conversion/sacrificial coatings
Step 3: Store & Monitor
Maintaining Protection Storage considerations:
- Controlled humidity.
- VPI packaging.
- Desiccants/dry cabinets.
- Inspection/testing.
Key Takeaways
Preventing corrosion in precision parts comes down to three critical steps: Clean → Protect → Store. By removing contaminants, applying chemical protection, and maintaining controlled storage conditions, manufacturers can extend part life, maintain tolerances, and reduce costly failures.
Metalloid Corrosion Inhibitors
Metcor 52 Water-Based Corrosion Preventative
Metcor 57 Solvent-Based Corrosion Preventative
Metcor 71 Botanical-Based NSF Food-Approved Corrosion Preventative
Metcor 908LV Mineral Oil-Based Corrosion Preventive
Find out more at Metalloidcorp.com/corrosion-inhibitors/rust-preventatives/
