Key principles.
General marine
Standard marine corrosion resistance.
Severe service
2× 316L strength. Severe marine.
Saltwater + HF
Highest saltwater immersion. HF acid resistance.
Strong acids
Premium acid-resistant alloy.
Chlorides
Excellent saltwater. Chemical industry.
Sacrificial
Zinc plating, galvanizing for steel protection.
FAQ
Dissimilar metals + electrolyte. Use compatible metals or insulate.
Localized deep pits in stainless from chlorides. Higher PRE alloys resist.
Stagnant fluid in tight gaps. Avoid crevices in design.
Specify chemical, concentration, temperature, exposure. Manufacturer recommends material.
Polished/passivated surfaces resist corrosion better than rough.
ASTM G corrosion test methods. Salt spray (ASTM B117) most common.
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