核心参数
仪器种类: 电化学仪器电极
PINE电化学部件RCE的工作原理介绍
电化学部件RCE的使用方法?
PINERCE多少钱一台?
电化学部件RCE可以检测什么?
电化学部件RCE使用的注意事项?
PINERCE的说明书有吗?
PINE电化学部件RCE的操作规程有吗?
PINE电化学部件RCE报价含票含运吗?
PINERCE有现货吗?
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X65管道钢在油/水乳液中的电化学腐蚀
The electrochemical corrosion behavior of X65 pipeline steel in the simulated oil/water emulsion was investigated under controlled hydrodynamic and electrochemical conditions by rotating disk electrode technique. Results demonstrated that mass-transfer of oxygen plays a significant role in the cathodic process of steel in both oil-free and oil-containing solutions. Electrode rotation accelerates the oxygen diffusion and thus the cathodic reduction. The higher limiting diffusive current density measured in oil-containing solution is due to the elevated solubility of oxygen in oil/water emulsion. The anodic current density decreases with the increase of electrode rotating speed, which is attributed to the accelerated oxygen diffusion and reduction, enhancing the steel oxidation. Addition of oil decreases the anodic dissolution of steel due to the formation of a layer of oily phase on steel surface, increasing the reaction activation energy. The steel electrode becomes more active at the elevated temperature, indicating that the enhanced formation of oxide scale is not sufficiently enough to offset the effect resulting from the enhanced anodic dissolution reaction kinetics. The corrosion reaction mechanism is changed upon oil addition, and the interfacial reaction is activation-controlled, rather than mass-transfer controlled. When sand particles are added in oil/water emulsion, there is a significant increase of corrosion of the steel. The presence of sands in the flowing slurry would impact and damage the oxide film and oily film formed on the steel surface, exposing the bare steel to the corrosive solution.
钢铁/金属
2012/07/17
理化(香港)有限公司 北京办事处
公司地址
理化(香港)有限公司 北京办事处
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