Nickel-Cobalt Alloy Coating Protects Steel Fasteners from Hydrogen Embrittlement


  • At the beginning of the year, Kathy Riggs Larsen of Materials Performance spoke with Doxsteel Corrosion specialists Omar Rosas and Oscar Garcia about the dangers of hydrogen embrittlement. A form of stress corrosion cracking (SCC), hydrogen embrittlement occurs when hydrogen penetrates a bolt’s base material, causing the steel to become brittle and susceptible to fracture. To prevent the permeation of hydrogen in production and provide a barrier to hydrogen in service, Rosas and Garcia have extensively tested bolting solutions using a controlled application of ASTM B994 SC18 Class 1 Nickel-Cobalt alloy.

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