Analysis of corrosion products formed on copper in Cl{sub 2}/H{sub 2}S/NO{sub 2} exposure

Journal Article · Wed Nov 01 04:00:00 EST 1995 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.2048400· OSTI ID:153690

Lenglet, M; Lopitaux, J ^[1]; Leygraf, C; Odnevall, I ^[2]; Carballeira, M; Noualhaguet, J C ^[3]; Guinement, J; Gautier, J ^[4]; Boissel, J

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1. Univ. de Rouen, Mont Saint Aignan (France). Laboratoire de Physico-Chimie des Materiaux
2. Royal Inst. of Tech., Stockholm (Sweden). Division of Corrosion Science
3. LCIE, Fontenay-aux-Roses (France)
4. CNET, Lannion (France)

A joint effort has been undertaken, involving four laboratories and nine different analytical techniques, aiming at characterizing corrosion products on copper formed in mixed flowing gas test containing Cl{sub 2}, H{sub 2}S, and NO{sub 2}. The results and considerations clearly show that the identification of different crystalline or noncrystalline phases in the corrosion products only can be performed by a combination of independently working analytical techniques. Cuprite, Cu{sub 2}O, is the dominating phase during initial exposure, whereas cuprite together with atacamite, Cu{sub 2}Cl(OH){sub 3}, are the most abundant phases after 10 days of exposure. In addition, the corrosion products contain minor amounts of sulfide, Cu{sub 2}S, sulfate, most likely as posnjakite, Cu{sub 4}SO{sub 4}(OH){sub 6}{center_dot}H{sub 2}O, and nitrate, most likely as gerhardite, Cu{sub 2}NO{sub 3}(OH){sub 3}. A nonstoichiometric cuprous oxide, Cu{sub 3}O{sub 2}, has also been detected by several techniques.

• Sponsoring Organization: USDOE
• OSTI ID: 153690
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 11 Vol. 142; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
54 ENVIRONMENTAL SCIENCES
ACID RAIN
AIR POLLUTION
CHEMICAL COMPOSITION
CHLORINE
COPPER
COPPER CHLORIDES
COPPER HYDROXIDES
COPPER OXIDES
COPPER SULFATES
COPPER SULFIDES
CORROSION
CORROSION PRODUCTS
CORROSIVE EFFECTS
HYDRATES
HYDROGEN SULFIDES
NITROGEN DIOXIDE
TIME DEPENDENCE