Mechanism of atmospheric corrosion of copper in the presence of submicron ammonium sulfate particles at 300 and 373 K

Journal Article · Mon Oct 31 23:00:00 EST 1994 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2059261· OSTI ID:6977510

Lobnig, R E ^[1]; Frankenthal, R P; Siconolfi, D J; Sinclair, J D ^[2]; Stratmann, M ^[3]

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1. AT and T Bell Labs., Murray Hill, NJ (United States) Max-Planck-Inst. fuer Eisenforschung, Duesseldorf (Germany)
2. AT and T Bell Labs., Murray Hill, NJ (United States)
3. Max-Planck-Inst. fuer Eisenforschung, Duesseldorf (Germany)

The corrosion mechanism of copper at 373 and 300 K in the presence of submicron (NH[sub 4])[sub 2]SO[sub 4] particle deposits has been investigated. Several in situ techniques have been used to monitor the corrosion process in real time. At and above the critical relative humidity of (NH[sub 4])[sub 2]SO[sub 4], dissolution of Cu is followed by formation of Cu[sub 2]O, oxidation of Cu(I) ions to Cu(II) ions, and precipitation of antlerite [Cu[sub 3](SO[sub 4])(OH)[sub 4]], brochantite [Cu[sub 4](SO[sub 4])(OH)[sub 6]], or posnjakite [Cu[sub 4](SO[sub 4])(OH)[sub 6][center dot]H[sub 2]O]. The amount of corrosion product formed increases with amount of (NH[sub 4])[sub 2]SO[sub 4] particles, relative humidity (RH), and temperature. The in situ techniques allowed the authors to confirm and refine the individual steps in the multistep mechanism proposed in earlier work.

• OSTI ID: 6977510
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 141:11; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
AIR POLLUTION
AMMONIUM COMPOUNDS
AMMONIUM SULFATES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COPPER
COPPER COMPOUNDS
COPPER HYDROXIDES
COPPER OXIDES
COPPER SULFATES
CORROSION
CORROSION PRODUCTS
CORROSIVE EFFECTS
DUSTS
ELEMENTS
HYDRATES
HYDROGEN COMPOUNDS
HYDROXIDES
KINETICS
METALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
REACTION KINETICS
SULFATES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
URBAN AREAS