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Corrosion Performance of Mil-prf-23377 Primer Coated on Laser-interference Structured Aluminum Alloy 2024

by Jiheon Jun, Adrian Sabau, Zachary M Burns, Michael S Stephens
Publication Type
Conference Paper
Book Title
The DoD-Allied Nations Technical Corrosion Conference 2019 Proceedings
Publication Date
Publisher Location
Pittsburgh, Pennsylvania, United States of America
Conference Name
2019 DoD-Allied Nations Technical Corrosion Conference
Conference Location
Oklahoma City, Oklahoma, United States of America
Conference Sponsor
US Department of Defense
Conference Date

Laser-Interference structuring (LIS) is a technique that was proposed to treat aluminum surface for improving primer adhesion. LIS may not require a series of chemical treatments, such as those used in chemical conver-sion coating (CCC) and sulfuric acid anodizing (SAA), which make the pre-treatment of Al panels simpler and quicker for primer painting. Previous test results indicated that LIS surface preparation enhances coating adhe-sion on Al 2024. To assess the effect of LIS on corrosion resistance of coating, Al 2024 panels prepared by LIS, CCC and SAA were coated with MIL PRF-23377 primers and exposed to salt spray environment according to ASTM B117. The exposure is currently in progress and the corrosion attack on the coated panels will be evalu-ated by the degree of blister formation and rust creepage according to ASTM standards.