Metal carboxylate formation during indoor atmospheric corrosion of Cu, Zn, and Ni

Journal Article · Mon May 01 04:00:00 EDT 1995 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.2048598· OSTI ID:63188

Persson, D; Leygraf, C ^[1]

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

Chemical analyses of surface films and corrosion products formed on pure Cu, Zn, Ni, and Ag samples exposed up to 12 months in various mild indoor environments have been performed by infrared reflection-absorption spectroscopy (IRAS) and X-ray photoelectron spectroscopy. The analyses reveal metal carboxylates to be the main ingredients on the surface of Cu, Zn, and Ni. Other ions, such as sulfate, chloride, nitrate, and ammonium ions are also present but in smaller amounts.The surface region on Ag contains mainly silver sulfide with smaller amounts of sulfate, ammonium, and chloride ions. The growth of the carboxylate layers, as followed by IRAS, exhibits an initial film formation with a thickness of a few nanometers for all exposure sites investigated. Subsequent growth to thicker layers was observed at sites with higher humidity levels. The unexpectedly high content of metal carboxylates found on Cu, Zn, and Ni may provide insight into possible processes involved in the atmospheric indoor corrosion of these metals.

• Sponsoring Organization: USDOE
• OSTI ID: 63188
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 5 Vol. 142; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
54 ENVIRONMENTAL SCIENCES
AMMONIUM COMPOUNDS
CARBOXYLIC ACID SALTS
CHEMICAL COMPOSITION
CHLORIDES
COPPER
CORROSION
CORROSION PRODUCTS
INDOOR AIR POLLUTION
NICKEL
NITRATES
SILVER
SULFATES
ZINC