Text version of the page

® ® ®

Corrosion Resistant Products Catalog - 15937 Material Basics

CRES bearing products utilize a variety of materials and coatings. Each material offers various levels ofload capacity and resistance to wear and corrosion. To better understand visual performance characteristics, EPT engineers have tested these materials in various conditions. Shown below are the materials in an untested state and after exposure to an acid and basic chemical.

MaterialBasic TestAcid Test

52100 Bearing Steel •Common bearing material•Good load capacity and wear resistance•Minimal corrosion resistance

Black Oxide

•Common bearing steel with oxidized surface •Marginal improvement to corrosion resistancecompared to 52100 bearing steel•Minimal corrosion resistance compared tocoatings or stainless steel

Zinc Dichromate Coating

•52100 bearing steel coated with zincdichromate•If scratched or damaged, the coating willsacrificially corrode to protect the base material•Zinc coatings are more prone to deterioratethen barrier coatings Thin Dense Chrome (TDC) •52100 bearing steel with a thin barrier coating •Good wear and abrasion resistance•May not hold up as well as thicker coatings overtime
10