ShoreLine Marine Stainless Steel Anchor Shackle - 5/16" Inch.

Shoreline Marine Stainless Anchor Shackles - 5/16".

Stainless steel shackles are great for marine or high humidity applications. Carbon steel rusts when exposed to the combination of air and water. It creates an iron oxide film that is active and will accelerate corrosion by duplicating itself. Stainless steel has a sufficient amount of chromium present so that a chromium oxide film forms, which is passive. This film prevents further corrosion and prevents it from spreading to the internal part of the anchor shackle.