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51318-10915-Analysis of Corrosion Damage on Samples Exposed to Accelerated and Outdoor Corrosion Environments

Marta A. Zuflacht, Erica N. Macha, Jessica Coogan, James F. Dante
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Quantitative analysis of the corrosion morphology after accelerated testing and outdoor exposures of lapjoint test panels coupled with various fastener materials. Image analysis of 3-D microscope images was used to quantify average depth of attack and percent surface area damage.

Product Number: 51318-10915-SG
Author: Marta A. Zuflacht, Erica N. Macha, Jessica Coogan, James F. Dante
Publication Date: 2018
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$20.00
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Accelerated corrosion tests are widely used in the industry and Department of Defense to determine the environmental performance of materials and coatings. While some cyclic tests show good correlations between performance in the laboratory and operational environments, they are only valid for very specific sets of performance metrics and generalizations often cannot be made. Significant work has been performed to investigate in detail the relationship between environmental variables and corrosion failure modes of various material systems. Relative humidity was found to be the single most relevant factor in governing atmospheric corrosion. This paper focuses on the quantitative analysis of the corrosion morphology after accelerated testing and outdoor exposures of lapjoint test panels coupled with various fastener materials. Image analysis of 3-D microscope images was used to quantify average depth of attack and percent surface area damage. A curve fitting routine was developed to quantify corrosion damage within a fastener hole. The effect of relative humidity on the mode and degree of corrosion was evaluated. The effect of different primer systems was also

 

Key words: atmospheric, galvanic, corrosion, lapjoint, accelerated testing

 

Accelerated corrosion tests are widely used in the industry and Department of Defense to determine the environmental performance of materials and coatings. While some cyclic tests show good correlations between performance in the laboratory and operational environments, they are only valid for very specific sets of performance metrics and generalizations often cannot be made. Significant work has been performed to investigate in detail the relationship between environmental variables and corrosion failure modes of various material systems. Relative humidity was found to be the single most relevant factor in governing atmospheric corrosion. This paper focuses on the quantitative analysis of the corrosion morphology after accelerated testing and outdoor exposures of lapjoint test panels coupled with various fastener materials. Image analysis of 3-D microscope images was used to quantify average depth of attack and percent surface area damage. A curve fitting routine was developed to quantify corrosion damage within a fastener hole. The effect of relative humidity on the mode and degree of corrosion was evaluated. The effect of different primer systems was also

 

Key words: atmospheric, galvanic, corrosion, lapjoint, accelerated testing

 

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