Indoor atmospheric corrosion of copper and steel under heat trap conditions in Cuban tropical climate

Abstract

Corrosion behaviour of copper and steel under heat trap conditions in Cuban tropical climate is reported. Temperature and humidity reach higher values than those reported for traditional outdoor and indoor conditions. Annual calculated time of wetness is in the range corresponding to outdoor or ventilated sheds. This behaviour is not reported for other indoor conditions. Sulphur compounds deposition rate is higher than chloride deposition rate at all corrosion stations. Main corrosion products formed on steel and copper are goethite and brochantite respectively. No significant differences in the statistical influence of exposure time and time of wetness on atmospheric corrosion process of copper and steel under heat trap conditions are determined.

Corrosion behavior of 316L and 304 stainless steels exposed to industrial-marine-urban environment: field study

“…27,28 However, high SO 2 content leads to formation of a highly stable goethite phase. 29 This may be related to the high time of wetness during atmospheric exposure. 30 It is obvious that temperature, wind speed, and humidity approached the highest values aer 6 months of exposure.…”

Evaluation of copper atmospheric corrosion in different environments of Iran

“…In addition to chemical composition of the patina layer morphology of corrosion products can also affect the corrosion rate of copper. 11 Morphology and cross-section of samples in these cities are shown in Fig. 8.…”

“…2,4,5,[8][9][10] In addition to crystalline oxides, formation of amorphous compounds due to atmospheric corrosion of copper have also been reported. 11 Most chemical compounds of patina have poor solubility; further more partially dissolved compounds will mostly re-precipitate during drying cycles which is normally a part of atmospheric corrosion condition. The action of rain water flushing the surface is the only feasible way to release the copper into the environment.…”

Particularities of indoor atmospheric corrosion of steel inside electric boxes in the tropical climate of Tabasco, Mexico

“…Temperature and RH in electric boxes was higher than outdoors. 28 In Colombia, there is no reported difference between the average temperature outdoors and inside heat trap boxes. 18 However, the maximum temperature recorded outdoors is almost ten degrees higher than inside the heat trap boxes.…”

“…S 1 classification for ClDR (according to ISO 9223:2012 6 ) is reported for Cojimar coastal site in Havana, Cuba. 28 The role of ClDR indoors is considered almost negligible, particularly in closed atmospheres, because the entrance of chloride aerosol is hindered by the external walls. However, in coastal sites of tropical climate, the entrance of chloride particles could sometimes occur not only like aerosol, but like fine particles, it could facilitate ClDR increase.…”