Accession Number : AD0652358

Title :   EFFECTS OF DEIONIZED WATER IMMERSION OF PREPARED ALUMINUM SURFACES ON ADHESIVE BONDABILITY.

Descriptive Note : Technical rept.,

Corporate Author : PICATINNY ARSENAL DOVER N J FELTMAN RESEARCH LABS

Personal Author(s) : Wegman,Raymond F. ; Bodnar,William M. ; Bodnar,Michael J. ; Barbarisi,Modesto J.

Report Date : MAY 1967

Pagination or Media Count : 26

Abstract : The effects of immersion in deionized water and in tap water on the bondability of 2024 aluminum which had been surface-treated with sulfuric acid-sodium dichromate solution were compared. Substantial losses in bond strengths were experienced with aluminum that had been immersed in deionized water. Poor bonding surfaces were readily identifiable from the formation of an iridescent coating which further investigation revealed to be related to the thickness of the hydrate layer formed. Addition of certain multivalent compounds to the deionized water was found to affect the formation of the hydrate layer and subsequently to increase the bond strengths. (Author)

Descriptors :   (*ALUMINUM ALLOYS, *BONDING), FAILURE(MECHANICS), BONDED JOINTS, LIQUID IMMERSION TESTS, WATER, ADHESIVES, SURFACE PROPERTIES, ADDITIVES

Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE