Accession Number:

ADA061758

Title:

Anodize Optimization and Adhesive Evaluations for Repair Applications.

Descriptive Note:

Final rept. 1 Dec 76-30 Jul 78,

Corporate Author:

BOEING COMMERCIAL AIRPLANE CO SEATTLE WASH

Personal Author(s):

• Locke,M. C.
• Horton,R. E.
• McCarty,J. E.

Report Date:

1978-07-01

Pagination or Media Count:

123.0

Abstract:

This report covers a two-task follow-on program to investigate phosphoric acid non-tank anodize process optimization and evaluation of adhesivesurface preparation combinations. Work completed in Task I included investigating non-tank anodizing process variables of voltage, time, temperature, and rinse delay. Other parameters studied included the effect of anodizing over titanium and aluminum fasteners, battery anodizing, anodizing mode, and identification of common errors occurring in non-tank anodizing. Following the anodizing variable investigation, bond verification tests were conducted to assess bondability of representative RT,250 F, and 350 F cure adhesive systems. This work served as a basis for selecting the phosphoric acid non-tank anodize process parameterconditions for Task II. The Task I work is reported in AFML-TR-78-7. Task II was aimed at developing a data base to facilitate repair bonding. Surface preparation methods including optimized FPL etch, and two hand-clean procedures, phosphoric acid non-tank anodize PANTA and PasaJell 105, were evaluated. Bondability and environmental durability of current and on-coming adhesive systems from TR,250 F, and 350 F cure categories were determined. Autoclave bonds versus vacuum bag bonds were compared. Author

Descriptors:

• *ANODIC COATINGS
• *ADHESIVE BONDING
• *PHOSPHORIC ACIDS
• PREPARATION
• ALUMINUM ALLOYS
• ETCHING
• SURFACES
• REPAIR
• VACUUM APPARATUS
• CURING
• ADHESIVES
• AUTOCLAVES

Subject Categories:

• Adhesives, Seals and Binders
• Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE