Erosion
By Luntao Wang and Yunying Xing and Zhiyong Liu and Dawei Zhang and Cuiwei Du and Xiaogang Li
Published in Journal of Natural Gas Science and Engineering
NULL
2016
Abstract
An unsteady state thin electrolyte film in the acidic environment of a natural gas pipeline was simulated using a self-assembled impingement jet system to study the corrosion behavior of 2205 duplex stainless steel (DSS) in gaseous environments with different relative humidity values. The electrochemical properties and surface morphologies of 2205 \DSS\ samples were analyzed. Corrosion did not occur on the surface of 2205 \DSS\ under wet conditions without gas impingement, whereas it did occur under the same conditions in the presence of gas flushing. The effect of gas-flow velocity was investigated with the help of computational fluid dynamics simulation. The results showed that the corrosion rate increased with accelerating flushing velocity in an environment with 80% relative humidity, particularly when the flow velocity was higher than 14
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