TY - JOUR
T1 - Modeling pit initiation rate as a function of environment for Aluminum alloy 7075-T651
AU - Cavanaugh, M. K.
AU - Birbilis, N.
AU - Buchheit, R. G.
PY - 2012/1/1
Y1 - 2012/1/1
N2 - Pit initiation in AA7075 was characterized by measuring metastable pits from potentiostatic testing. Environmental conditions included a range of temperatures (0-60°C), chloride concentration (0.01-0.6 M), electrolyte pH (2.5-10) and electrochemical potential (E). Metastable pit initiation rate, λ, was shown to have a dependence on all environmental variables, which is highly relevant to practical service. As a result of the wide variation in λ, an artificial neural network (ANN), rather than a deterministic model, was utilized to model λ as a function of environment. Additionally, the significant body of results herein sheds light on the general pitting characteristics of such high strength Al-alloys in a quantitative sense - whereby T, pH, and [Cl -] were all deemed significant parameters in accurately determining λ.
AB - Pit initiation in AA7075 was characterized by measuring metastable pits from potentiostatic testing. Environmental conditions included a range of temperatures (0-60°C), chloride concentration (0.01-0.6 M), electrolyte pH (2.5-10) and electrochemical potential (E). Metastable pit initiation rate, λ, was shown to have a dependence on all environmental variables, which is highly relevant to practical service. As a result of the wide variation in λ, an artificial neural network (ANN), rather than a deterministic model, was utilized to model λ as a function of environment. Additionally, the significant body of results herein sheds light on the general pitting characteristics of such high strength Al-alloys in a quantitative sense - whereby T, pH, and [Cl -] were all deemed significant parameters in accurately determining λ.
KW - 7xxx series
KW - Aluminum alloys
KW - Corrosion
KW - Metastable pitting
KW - Neural networks
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U2 - 10.1016/j.electacta.2011.10.069
DO - 10.1016/j.electacta.2011.10.069
M3 - Article
AN - SCOPUS:84655169271
SN - 0013-4686
VL - 59
SP - 336
EP - 345
JO - Electrochimica Acta
JF - Electrochimica Acta
ER -