Corrosion Resistant Products - CRES-07 - Browning - #10

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10 ® ® ® Material Acid Test Basic Test CRES bearing products utilize a variety of materials and coatings. Each material offers various levels of load 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. Material Basics 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 resistance compared to 52100 bearing steel • Minimal corrosion resistance compared to coatings or stainless steel Zinc Dichromate Coating • 52100 bearing steel coated with zinc dichromate • If scratched or damaged, the coating will sacrificially corrode to protect the base material • Zinc coatings are more prone to deteriorate then 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 over time