Accession Number : ADA331007

Title :   Evaluation of Environmentally Acceptable Protection Schemes for High Strength Steel Fasteners, Tri-Service Committee on Corrosion Proceedings.

Corporate Author : ARMY RESEARCH LAB WATERTOWN MA MATERIALS DIRECTORATE

Personal Author(s) : Placzankis, Brian ; Levy, Milton ; Beatty, J. ; Isserow, S. ; Kane, K.

PDF Url : ADA331007

Report Date : JUN 1994

Pagination or Media Count : 29

Abstract : Initial corrosion testing was done by ARL Materials Directorate in 1991 in a TACOM (Tank/Automotive Command) sponsored study to determine the effects of substituting Zinc or various other coating systems in the place of electroplated Cadmium. In addition to test assemblies utilizing a single coating, mixed assemblies comprised of various coated bolts and Cadmium coated washers/nuts were evaluated. The results were published in a technical report (MTL TR 92-40),1 which contains complete corrosion data and photographic documentation of the corrosion observed throughout the test program for Cd, Zn-Ni, Zn OD (Olive Drab finish), Zn-Co, Sn-Zn, and modified phosphate coatings. This paper will summarize these results, and add data for lVD Al. Three types of lVD Al are compared against the Cadmium and Zn-Ni plating.

Descriptors :   *CORROSION, *COATINGS, *FASTENINGS, *BOLTS, SYMPOSIA, TEST EQUIPMENT, HIGH STRENGTH ALLOYS, STEEL, ZINC, CADMIUM, WASHERS(SPACERS), PHOSPHATE COATINGS.

Subject Categories : Physical Chemistry
      Properties of Metals and Alloys
      Couplers, Fasteners, and Joints
      Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE