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• ANSI B18.2.1 Bolt Blackening Process Business & Finance
  Production process of high strength blackened ANSI B18.2.1 bolts
  
  Mounting rack → Degreasing with boiling alkali solution → Water cleaning → Derusting with hydrochloric acid solution → Water cleaning → Boiling water heating → Oxidation →...  moreProduction process of high strength blackened ANSI B18.2.1 bolts
  
  Mounting rack → Degreasing with boiling alkali solution → Water cleaning → Derusting with hydrochloric acid solution → Water cleaning → Boiling water heating → Oxidation → Water cleaning → Saponification → Water cleaning → Self-drying → Hot oil dipping → Oil control → Inspection → Storage.  
• ab yihui (owner)
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  • Last updated January 12, 2020
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