Corrosion of working chains continuously immersed in seawater |
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Authors: | Robert E. Melchers Torgeir Moan Zhen Gao |
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Affiliation: | (1) Centre for Infrastructure Performance and Reliability, School of Engineering, The University of Newcastle, Australia, 2308;(2) Centre for Ships and Ocean Structures, Norwegian University of Science and Technology, CeSOS, NO-7491, Trondheim, Norway |
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Abstract: | Chains used in the offshore industry typically are exposed to continued high rates of corrosion, in part due to the working of the chain not permitting a build up of protective rusts. Herein, a procedure is described for estimating the corrosion loss of low-alloy steel chain under continued immersion corrosion conditions. The procedure is based on extensive recent investigations of the effects of water temperature, salinity, water velocity, and surface roughness on steel corrosion under field conditions. Since the working of the chain does not allow corrosion products (rust) to build up on the critical contact surfaces, erosion due to wear and abrasion can be estimated separately. Two example applications are given. |
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Keywords: | Chain Steel Immersion Corrosion Offshore Prediction |
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