rusty bolt and fasteners

Types of fastener corrosion

We all want to minimize fastener corrosion, right? Insulation, proper coatings, and paint can help seal fasteners to prevent rust and other corrosion. It’s important to choose the right materials and make sure the pressure and applications are correct.

Here are some types of fastener corrosion that commonly occur:

  • Crevice: Seen in narrow gaps and openings where there is a lack of good ventilation.
  • Galvanic: Occurs when two different types of metal touch and electricity flow between them — corrosion is left as a residue.
  • Pitting: Tiny, almost undetectable holes form on fasteners, usually those made of nickel and chromium where surfaces are soiled.
  • Uniform: Whole surface area corrodes due to lack of or improperly applied coating.
  • Intergranular: Can appear when stainless steel reaches very hot temperatures (as it’s being welded or hot-formed) — prevented when a welder plunges the steel into water during the process.

Take the steps to prevent corrosion with careful planning and the selection of the right materials in every project. Contact Fasteners, Inc. for more details and suggestions.

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