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20#碳钢和304不锈钢在高温环烷酸中的腐蚀研究 预览

Research on Corrosion of 20#Carbon Steel and 304 Stainless Steel in High Temperature Naphthenic Acid
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摘要 采用高温高压反应釜进行高温环烷酸腐蚀试验,改变试验温度、介质浓度和流速等因素,研究了20#碳钢和304不锈钢在高温条件下的腐蚀行为。结果表明,温度、介质浓度和流速对环烷酸的腐蚀速率有显著的影响。两种材质在环烷酸中的腐蚀速率随温度升高,均呈现先增加后减小的规律,20#碳钢的腐蚀速率远大于304不锈钢。280℃时,20#碳钢的腐蚀速率与环烷酸浓度呈线性增加关系。同条件下,304不锈钢的腐蚀速率存在明显的拐点,酸值浓度为5~10mgKOH·g-1时,其腐蚀速率呈高梯度的增加。碳钢的环烷酸腐蚀速率对流速的变化敏感,腐蚀梯度随介质流速增加而明显增大。304不锈钢的腐蚀速率较低,流速为3.40m·s-1时,其腐蚀速率仅为0.0632mm·a-1。 A high temperature and high pressure reaction kettle was used to investigate the corrosion behavior of 20#carbon steel and 304 stainless steel in high temperature naphthenic acid by adjusting different temperatures,different concentrations of naphthenic acid and different fluid velocityics.The results showed that temperature,concentrations of naphthenic acid and fluid velocityics had a significant effect on the corrosion rate of naphthenic acid.The corrosion rate of the two materials in naphthenic acid increased first and then decreased with the increase of temperature.20#carbon steel corrosion rate was much greater than 304 stainless steel.At 280℃,the corrosion rate of 20#carbon steel increased linearly with the concentration of naphthenic acid.Meanwhile,there was a significant inflection point in the corrosion rate of 304 stainless steel.When the acid concentration was 5~10mg KOH/g,the corrosion rate increased with high gradient.The naphthenic acid corrosion rate of carbon steel was sensitive to the change of flow rate.The corrosion gradient increased with the increase of the flow rate of the medium.The corrosion rate of 304 stainless steel was low.At a flow rate of 3.40 m/s,the corrosion rate was only 0.0632 mm/a.
作者 张战军 蔡沛家 ZHANG Zhanjun;CAI Peijia(Guangdong University of Petrochemical Technology,Maoming 525000,China)
出处 《化工技术与开发》 CAS 2018年第9期63-65,69共4页 Technology & Development of Chemical Industry
基金 茂名市石油化工腐蚀与安全工程技术研究开发中心开放基金项目。
关键词 环烷酸 腐蚀 高温 碳钢 不锈钢 naphthenic acid corrosion high temperature carbon steel stainless steel
作者简介 张战军(1986-),实验师,研究方向:石油炼制加工。E-mail:727187783@qq.com。
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