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THE FORMATION OF PRODUCT SCALE AND MASSTRANSFER CHANNELS DURING CO2 CORROSION |
Guoxian Zhao;Changfeng Chen;MinXV Lu |
中国石油天然气集团公司管材研究所 |
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Abstract Formation of corrosion product scale and mass trans fe r channels in the scale during CO2 corrosion have been studied by means of SEM .Three layers of FeCO3 scale have different composition and structure.Many cha nnels are found inside the layers,which makes the corrosive medium reach the sur face of the metal.The reasons for forming the channel include FeCO3 itself unp erfect,dissolution of the scale in the corrosive medium,cracking of the scale re sulting from stress inside it,etc.All these result in the severe local corrosion of the metal.
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Received: 13 July 2001
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Corresponding Authors:
Guoxian Zhao
E-mail: zhaoguoxianxian@sohu.com
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