Desired Characteristics Of Corrosion Protection Material - Jeep COMPASS Repair Manual

Corrosion Protection

Desired Characteristics of Corrosion Protection Material

1. Corrosion prevention material- The material must displace water to prevent corrosion. This can be tested by
spraying water on an open panel on the floor, then spraying the corrosion preventative material over the watered panel
and observing if the material displaces the water.
2. Creepage of material- To insure thorough and complete protection coverage, the material should have a "creep"
capability, approximately 1/4 inch per minute while drying. This assures protective penetration of pinch welds, cracks, etc.
3. Safe material- Material should be non-combustible when dried and when wet unable to support a fire after ignition.
4. Clean-up- The material should be of a viscosity which inhibits runs or drips. Overspray on a vehicle's painted surface
should wipe off easily without solvent when wet, with solvent when dry. The material should also dry clean off clothing.
5. Guarantee/Warranty- The corrosion protection has to be done to maintain factory corrosion warranty.
Manufacturer's recommendations must be followed.
Glossary:
Abrasion Corrosion - Rubbing or hitting of one material by another
Corrosion Protection - Material applied to deter corrosion (oxidation)
Crevice Corrosion - Oxidation when two metals are joined
Electrolytic Corrosion - Electrical action taking place between two materials in the presence of an electrolyte (liquid)
Fogging - Applying material in a mist form
Fretting - Deterioration of metal at contact surfaces due to motion and corrosive elements
Galvanic Corrosion - Electrical action (electrolysis) between two dissimilar metals in the presence of electrolyte (liquid)
Hot Spot - An unprotected area subject to corrosion
Pitting Corrosion - Corrosion on a surface the results in a small "specks" or "pinholes"
Stress of Fatigue, Cracking Corrosion - Cracking due to stress and atmospheric elements
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