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Environmental factors affecting localized corrosion of 7075-t7351 aluminum alloy plate

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Abstract

An earlier paper on the mechanism of localized corrosion of 7075 alloy plate in 3.5 pct NaCl solution showed that pitting of an anodic zone in the vicinity of grain boundaries caused intergranular corrosion of 7075-T651 (peak aged condition). It also showed that overaging to the T7351 temper reduced the difference between pitting potentials of the grain boundaries and grain interiors so that intergranular corrosion could not be sustained. This paper shows that certain changes in the environment strongly affect the difference between pitting potentials of the grain interior and the anodic grain boundary of 7075-T7351. Consequently, the susceptibility for intergranular corrosion is substantially greater in certain environments. Nitrates are most detrimental. The effects of sulfates and pH in chloride + nitrate solutions were relatively small.

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References

  1. D. O. Sprowls and R. H. Brown:International Conference on Fundamental Aspects of Stress-Corrosion Cracking, R.W. Stahle,et al, eds., National Association of Corrosion Engineers, Houston, TX, 1969, pp. 466–512.

    Google Scholar 

  2. S. Maitra and G. C. English:Metall. Trans. A, 1981, vol. 12A, p. 535.

    Google Scholar 

  3. C. R. Shastry and G. Judd:Metall. Trans., 1972, vol. 3, p. 779.

    Article  CAS  Google Scholar 

  4. P. Doig and J. W. Edington:Corrosion, 1975, vol. 31, p. 347.

    CAS  Google Scholar 

  5. J.M. Chen, T. S. Sun, R. K. Viswanadham, and J.A.S. Green:Metall. Trans. A, 1977, vol. 8A, p. 1935.

    CAS  Google Scholar 

  6. L.H. Callendar:Engineering, 1925, vol. 120, p. 340.

    CAS  Google Scholar 

  7. H. Bohni and H.H. Uhlig:J. Electrochem. Soc, 1969, vol. 116, p. 906.

    Article  Google Scholar 

  8. V. P. Kassyura and E. M. Zaretskii:Zaschita Metallov, 1968, vol. 4, p. 376.

    CAS  Google Scholar 

  9. A. M. McKissick, Jr., A. A. Actams, and R. T. Foley:J. Electrochem. Soc, 1970, vol. 117, p. 1459.

    Article  CAS  Google Scholar 

  10. B. W. Lifka:Aluminium, 1977, vol. 53, p. 750.

    CAS  Google Scholar 

  11. J. R. Galvele and S. M. de DeMicheli:Corrosion Science, 1970, vol. 10, p. 795.

    Article  CAS  Google Scholar 

  12. H. Kaesche:Z. Phys. Chemie, 1962, vol. 34, p. 87.

    CAS  Google Scholar 

  13. I.L. Muller and J. R. Galvele:Corrosion Science, 1977, vol. 17, p. 995.

    Article  CAS  Google Scholar 

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Authors and Affiliations

  1. Alloy Technology Division, Aluminum Company of America, Alcoa Technical Center, 15069, Alcoa Center, PA

    Shantanu Maitra (Staff Scientist) & G. C. English (Tech-nologist)

Authors
  1. Shantanu Maitra
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  2. G. C. English
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Maitra, S., English, G.C. Environmental factors affecting localized corrosion of 7075-t7351 aluminum alloy plate. Metall Trans A 13, 161–166 (1982). https://doi.org/10.1007/BF02642428

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  • DOI: https://doi.org/10.1007/BF02642428

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