Outdoor atmospheric corrosion of copper in Saudi Arabia

Author: Syed, S.

Source: Corrosion Engineering, Science and Technology, Volume 43, Number 3, September 2008 , pp. 267-272(6)

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Abstract:

Copper specimens have been exposed to the action of marine, marine industrial, urban and rural atmospheres of Saudi Arabia. Environmental factors such as average temperature, average relative humidity and deposition rates of atmospheric pollutants (i.e. Cl^- and SO₂) was investigated. By applying the standard ISO 9223, the aggressiveness of the atmospheres corresponding to the different test stations has been determined. Calculations of corrosion rates were made via loss of weight after one, two and three years of exposure and characterisation of the corrosion products formed on samples have been analysed using X-ray diffraction. Three main sequences have been identified on outdoor copper, representing different reaction routes in chloride dominated environments. Many kinds of patina were found on copper specimens such as cuprite (Cu₂ O), atacamite (Cu₂ Cl(OH)₃), paratacamite (Cu₂ (OH)₃Cl), copper amine nitrite hydroxide, gerhardite, copper hydroxide nitrate and copper amine nitrate.

Keywords: CORROSION PRODUCT; XRD; COPPER; ATMOSPHERIC CORROSION; WEIGHT LOSS

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/174327807X234705

Publication date: 2008-09-01

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