Evaluation of Sermetel W Coating for Fasteners

Abstract

The evaluated coating SermeTel W with Alodine 407-47 conversion coating is intended for use on titanium fasteners, fasteners in titanium structures and alloy steel fasteners in temperature environments beyond cadmium coating capabilities. The cadmium coating is not acceptable for titanium application since titanium fasteners or titanium structures in contact with cadmium are susceptible to cracking when highly stressed even at temperatures well below 450 F. The investigation in this report included reusability (locking torques), torque-tension relationship, tension-tension fatigue, salt spray, coating thickness and coating continuity. The test results of samples coated with SermeTel W were compared with cadmium coated samples and were found to be suitable for alloy steel fasteners which are in contact with titanium structures or are exposed to temperatures above 450 F.

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Document Details

Document Type
Technical Report
Publication Date
Jul 11, 1975
Accession Number
ADA016809

Entities

People

  • M. J. Zurko

Organizations

  • Naval Air Warfare Center Warminster

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Aerial Warfare
  • Aircrafts
  • Aluminum Coatings
  • Chromium Compounds
  • Classification
  • Continuity
  • Fatigue Life
  • Hydrogen Embrittlement
  • Material Degradation Processes
  • Materials
  • Navy
  • Plastic Explosives
  • Security
  • Standards
  • Test And Evaluation
  • Thickness
  • Vehicles

Readers

  • Materials Science and Engineering.
  • Surface Coatings Technology.