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

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...

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Bibliographic Details
Published inJournal of the Electrochemical Society Vol. 141; no. 11; pp. 2935 - 2941
Main Authors LOBNIG, R. E, FRANKENTHAL, R. P, SICONOLFI, D. J, SINCLAIR, J. D, STRATMANN, M
Format Journal Article
LanguageEnglish
Published Pennington, NJ Electrochemical Society 01.11.1994
Subjects
360105 - Metals & Alloys- Corrosion & Erosion
AIR POLLUTION
AMMONIUM COMPOUNDS
AMMONIUM SULFATES
Applied sciences
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COPPER
COPPER COMPOUNDS
COPPER HYDROXIDES
COPPER OXIDES
COPPER SULFATES
CORROSION
Corrosion mechanisms
CORROSION PRODUCTS
CORROSIVE EFFECTS
DUSTS
ELEMENTS
Exact sciences and technology
HYDRATES
HYDROGEN COMPOUNDS
HYDROXIDES
KINETICS
MATERIALS SCIENCE
METALS
Metals. Metallurgy
OXIDES
OXYGEN COMPOUNDS
POLLUTION
REACTION KINETICS
SULFATES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
URBAN AREAS
Fourier transformation
Infrared absorption
Temperature effect
Transition metal
Experimental study
Corrosion product
Submicron particle
Time dependence
Ammonium sulfate
Optical microscopy
Precipitation
Humidity
pH
Oxidation
SEM
Copper
Atmospheric corrosion
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Summary: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.
ISSN:0013-4651
1945-7111
DOI:10.1149/1.2059261