The atmospheric corrosion of nickel in a rural atmosphere

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1838043· OSTI ID:562211

Odnevall, I; Leygraf, C ^[1]

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1. Royal Inst. of Tech., Stockholm (Sweden)

The initial corrosion behavior of nickel exposed under sheltered conditions in a rural atmosphere has been investigated using two starting dates in April and October. Emphasis has been placed upon short-term exposure periods from 1 day to 4 months but longer exposure periods up to 1.5 years have also been included. A multianalytical approach has been used to characterize the corrosion products, which have resulted in a coherent picture with respect to both surface composition and morphology. Within hours of exposure, a thin film of NiO and Ni(OH){sub 2} is observed on the freshly polished nickel surface. After a few days, independent of starting date, sulfate-containing corrosion products are formed with characteristic dendritic morphology. The sulfate-containing corrosion products are formed with characteristic dendritic morphology. The sulfate-containing corrosion products grow laterally and cover 25 to 30% of the nickel surface after 120 days of exposure. Promoted by initial dry and wet periods and by increased concentrations of sulfate particulates, the formation of sulfate-containing corrosion products is faster in April than in October. After 1 year of exposure, the composition is NiSo{sub 4} {center_dot} 6H{sub 2}O.

• Sponsoring Organization: USDOE
• OSTI ID: 562211
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 10 Vol. 144; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
54 ENVIRONMENTAL SCIENCES
ATMOSPHERIC CHEMISTRY
CORROSION
NICKEL
NICKEL HYDROXIDES
NICKEL OXIDES
NICKEL SULFATES
RURAL AREAS
WEATHERING