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Closed Access item A comparative study on copper corrosion originated by formic and acetic acid vapours

Authors:López-Delgado, Aurora
Cano Díaz, Emilio
Bastidas Rull, José María
López Gómez, Félix Antonio
Keywords:Copper corrosion, Acetic acid vapours, Formic acid vapours
Issue Date:2001
Publisher:Springer
Citation:Journal of Materials Science 36 (21) : 5203-5211 (2001)
Abstract:The copper corrosion rate and products originated by the action of formic and acetic acid vapours at a 100% relative humidity were studied. Copper specimens were exposed to formic and acetic acid vapours for a period of 21 days. Five formic and acetic acid vapour concentrations (10, 50, 100, 200 and 300 ppm) were tested. Copper corrosion rates of up to 1300 mg m−2 d−1 (mmd) for formic acid and up to 2300 mmd for acetic acid were measured using a gravimetric method. The corrosion-product layers were characterised using electrochemical, X-ray powder diffraction and scanning electron microscopy techniques. Some of the compounds identified were: cuprite (Cu2O), for both acids; cupric hydroxide monohydrate (Cu(OH)2 ·H2O) and copper formate tetrahydrate (Cu(HCOO)2 · 4H2O), for formic acid; and copper acetate dihydrate (Cu(CH3COO)2 · 2H2O) and copper hydroxide acetate dihydrate (Cu4(OH)(CH3COO)7 · 2H2O), for acetic acid.
Publisher version (URL):http://dx.doi.org/10.1023/A:1012497912875
URI:http://hdl.handle.net/10261/44990
ISSN:0022-2461
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