Atmospheric corrosion effects of HNO3—Influence of temperature and relative humidity on laboratory-exposed copper

Samie, Farid; Tidblad, Johan; Kučera, V.; Leygraf, Christofer

doi:10.1016/j.atmosenv.2006.10.018

Cited by 35 publications

(26 citation statements)

References 23 publications

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“…This section begins with a synthesis of results from exposures, governed mainly by sulphur containing pollutants, and followed by a corresponding synthesis of chlorine governing exposures observed by Odnevall The chloride dominated route includes atacamite (Cu 2 Cl(OH) 3 ) and paratacamite (Cu 2 (OH) 3 Cl) as end products and proceeds via nantokite (CuCl) as a precursor. Nantokite is formed through dissolution of cuprite to produce cuprous ions, and the reaction of the latter with chloride ions.…”

Section: Generalised Patina Evolution Sequencementioning

confidence: 99%

“…18 This process occurs most likely through many subsequent dissolution ion pairing precipitation steps, which finally results in atacamite as the reaction end products. The procedure enabled a general scheme to be generated which describes the evolution of copper patina formed upon exposure to outdoor chlorine polluted environments has been identified, in which cuprite (Cu 2 O) formation is followed by nantokite (CuCl) and atacamite (or the isomorphous compound paratacamite, Cu 2 Cl(OH) 3 ).…”

Section: Generalised Patina Evolution Sequencementioning

confidence: 99%

“…Samples exposed at Khober, Jubail-1, Farsan, Makkah, Khafji, and Jeddah show atacamite (Cu 2 Cl(OH) 3 ). Paratacamite (Cu 2 (OH) 3 Cl) has been identified on samples at Jubail-2, Farsan, Yanbu, Wajah and Turaif. Copper amine nitrite hydroxide is present, in small amounts on Jubial-1 coupons.…”

Section: Determination Of Corrosion Products By Xrdmentioning

confidence: 99%

“…The author finds peaks originating from chlorine containing corrosion products such as atacamite (Cu 2 Cl(OH) 3 ) and paratacamite (Cu 2 (OH) 3 Cl) at Khober, Jubail-1, Farsan, Makkah, Khafji, Jeddah, Yanbu, Wajah and Turaif coupans. Paratacamite is said to be an isomorphous compounds of atacamite to which is transformed with time although there was much more chlorine on the copper samples at above sites than sulphur.…”

Section: Determination Of Corrosion Products By Xrdmentioning

confidence: 99%

“…In chloride-polluted environments, a copper patina formed upon exposure has been identified, in which cuprite formation is followed by nantokite (CuCl) and atacamite (or the isomorphous compound paratacamite, Cu 2 Cl(OH) 3 ). Cuprite (Cu 2 O) was found in the corrosion products formed on all the coupons, independent of the different environments.…”

Section: Riyadhwhailmentioning

confidence: 99%

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Outdoor atmospheric corrosion of copper in Saudi Arabia

Syed¹

2008

Corrosion Engineering, Science and Technology

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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 2 and SO 2 ) 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 (Cu 2 O), atacamite (Cu 2 Cl(OH) 3 ), paratacamite (Cu 2 (OH) 3 Cl), copper amine nitrite hydroxide, gerhardite, copper hydroxide nitrate and copper amine nitrate.

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Section: Generalised Patina Evolution Sequencementioning

confidence: 99%

Section: Generalised Patina Evolution Sequencementioning

confidence: 99%

Section: Determination Of Corrosion Products By Xrdmentioning

confidence: 99%

Section: Determination Of Corrosion Products By Xrdmentioning

confidence: 99%

Section: Riyadhwhailmentioning

confidence: 99%

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Outdoor atmospheric corrosion of copper in Saudi Arabia

Syed¹

2008

Corrosion Engineering, Science and Technology

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Copper and Copper Alloys

Sequeira

2011

Uhlig's Corrosion Handbook

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Corrosion mechanism of copper immersed in ammonium sulfate solution

Chen

et al. 2018

Materials & Corrosion

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(NH4)2SO4 is abundant in the dust of the rural and industrial atmosphere, by which a thin layer of (NH4)2SO4 solution will be formed on the copper surface and give rise to serious corrosion as soon as the ambient humidity gets the critical relative humidity. In this work, the corrosion mechanism of copper in (NH4)2SO4 solution was studied by microgravimetry associated with SEM/EDS, FT‐IR, XRD, titration method, and electrochemical tests. The results suggest that the corrosion of copper is not only caused by electrochemical effect, but also caused by the synergistic actions of the electrochemical and chemical reactions. In addition, it is found that the presence of free Cu2+ is the prerequisite for the formation of corrosion products on copper immersed in (NH4)2SO4 solution. NH4+ plays a dual role in promoting the corrosion of copper and inhibiting the formation of corrosion products on copper surface.

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Atmospheric corrosion effects of HNO3—Influence of temperature and relative humidity on laboratory-exposed copper

Cited by 35 publications

References 23 publications

Outdoor atmospheric corrosion of copper in Saudi Arabia

Outdoor atmospheric corrosion of copper in Saudi Arabia

Copper and Copper Alloys

Corrosion mechanism of copper immersed in ammonium sulfate solution

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