Location

La Jolla, CA

Start Date

1979 12:00 AM

Description

Al 7075-T6 samples have been surface treated by the phospheric acid anodize (PAA) and by the standard FPL etch for comparison. These samples were then deliberately contaminated, bonded and given lap shear or wedge endurance tests to discover the effect of the contamination. The results indicate that the PAA surface is very forgiving of certain types of contamination but not others. The FPL etch surface is sensitive to even a monolayer of contamination. Our NDI surface contamination automatic mapping facility can detect contamination well below the level that significantly degrades the adhesive joints.

Book Title

Proceedings of the ARPA/AFML Review of Progress in Quantitative NDE

Chapter

7. NDE for Advanced Materials

Pages

275-284

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Surface Contamination: NDE Mapping and Effects on Bond Strength

La Jolla, CA

Al 7075-T6 samples have been surface treated by the phospheric acid anodize (PAA) and by the standard FPL etch for comparison. These samples were then deliberately contaminated, bonded and given lap shear or wedge endurance tests to discover the effect of the contamination. The results indicate that the PAA surface is very forgiving of certain types of contamination but not others. The FPL etch surface is sensitive to even a monolayer of contamination. Our NDI surface contamination automatic mapping facility can detect contamination well below the level that significantly degrades the adhesive joints.