Evaluation of the effect of Ni-P coating on the corrosion resistance of the aluminium 7075 T6 alloy

Authors

  • L. Gil Departamento de Ingeniería Metalúrgica, Universidad Nacional Experimental Politécnica (UNEXPO)
  • L. Jiménez Departamento de Ingeniería Metalúrgica, Universidad Nacional Experimental Politécnica (UNEXPO)
  • A. C. Castro Escuela de Ingeniería Metalúrgica y Ciencia de los Materiales, Facultad de Ingeniería, Universidad Central de Venezuela
  • M. H. Staia Escuela de Ingeniería Metalúrgica y Ciencia de los Materiales, Facultad de Ingeniería, Universidad Central de Venezuela
  • E. S. Puchi-Cabrera Escuela de Ingeniería Metalúrgica y Ciencia de los Materiales, Facultad de Ingeniería, Universidad Central de Venezuela

DOI:

https://doi.org/10.3989/revmetalm.2008.v44.i1.96

Keywords:

Aluminum 7075 T6, Electroless Ni-P, Corrosion, Exfoliation, Pitting

Abstract


The aluminum alloy 7075-T6 is a structural alloy widely used for aeronautical applications due to its high relationship between mechanical resistance and weight. Depending upon the environmental conditions, many types of corrosion mechanisms such as intergranular, exfoliation, have been found to occur in aircraft structural aluminum alloys. A significant advance in order to improve the behavior of this alloy is related to the application of the autocatalytic Ni-P coating which confers an excellent corrosion resistance coupled with both reduced erosive wear and higher hardness. The purpose of this work was to investigate the effect of the application of a Ni-P coating on the corrosion resistance of an aluminum 7075-T6 alloy. The results obtained indicated that the application of the Ni-P coatings diminishes the susceptibility to pitting and makes the aluminum 7075 T6 alloy immune to the exfoliation corrosion attack.

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Published

2008-02-28

How to Cite

Gil, L., Jiménez, L., Castro, A. C., Staia, M. H., & Puchi-Cabrera, E. S. (2008). Evaluation of the effect of Ni-P coating on the corrosion resistance of the aluminium 7075 T6 alloy. Revista De Metalurgia, 44(1), 66–73. https://doi.org/10.3989/revmetalm.2008.v44.i1.96

Issue

Vol. 44 No. 1 (2008)

Section

Articles

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