Hydrogen Embrittlement of Metal Fasteners Due to Phosphoric Acid Containment System (PACS) Exposure. Volume 5 - Delivery Order 4, Task 2

Abstract

The objective of this study was to determine if metal fasteners are susceptible to hydrogen embrittlement due to exposure to a phosphoric acid containment system (PACS) surface preparation. A PACS is used to anodize aluminum surfaces in preparation for adhesive bonding. Due to the containment system provided by PACS, it has the ability to be used in aircraft repair applications. Concerns have been raised as to whether the PACS surface preparation may be used in an area that contains metal fasteners. The objective was accomplished by exposing mechanically loaded fasteners of various metal materials to PACS. Following the PACS exposure, the fasteners were rinsed and reloaded for 96 hours. Failure of the fasteners during either the PACS exposure or the sustained loading deemed the fastener embrittled.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1999
Accession Number
ADA400419

Entities

People

  • William B. Pinnell

Organizations

  • University of Dayton

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acids
  • Adhesives
  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Aluminum
  • Embrittlement
  • Government Procurement
  • Governments
  • Hydrogen
  • Hydrogen Embrittlement
  • Materials
  • Metals
  • Phosphoric Acids
  • Stainless Steel
  • Test Methods
  • Tool Steel

Readers

  • Materials Science and Engineering.
  • Medical or Health Care Field.
  • Surface Engineering/Surface Coating Technology.