Abstract
A corrosion model was developed to correlate the atmospheric corrosion rates of 50 volume% nickel (Ni)-coated carbon (C) fiber reinforced pure aluminum (Al (99.99%)/C/50f) metal-matrix composites (MMCs) to weather and environmental parameters such as chloride (Cl−) deposition rate, aerosol pH, and the percentage of time wet (Q4). The model was developed using polarization data of Al and C in solutions of various pH levels and Cl− concentrations. The polarization data indicated that the galvanic corrosion current (igalv) between Al and C is a function of Cl− concentration and pH. There was a linear relationship between the logarithm of igalv and the logarithm of Cl− concentrations in neutral solutions with an R2 value close to 0.95. Using the linear relationship, a corrosion model was developed that estimated the atmospheric corrosion rate of Al (99.99%)/50 MMCs as a function of the Cl− deposition rate and Q4 (i.e., [Cl‑]K•Q4), where K is the slope of the log (igalv) vs log (Cl−) curve. The atmospheric corrosion rates of Al (99.99%)/C/50f MMCs in marine, rain forest, agricultural, dry, and industrial test sites in Hawai’i were plotted against the model ([Cl−]K•Q4), which resulted in an R2 value equal to approximately 0.7.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
