不锈钢基高通量换热管多孔层的耐乙酸腐蚀特性

发布时间：2018-03-11 13:20

本文选题：不锈钢　切入点：多孔高通量换热管　出处：《化工进展》2017年06期 　论文类型：期刊论文

【摘要】：表面多孔高通量换热管是一种高效的强化沸腾传热元件。为了提高表面多孔高通量换热管的耐腐蚀性能,本文采用粉末烧结工艺在不锈钢换热管表面烧结了一层不锈钢基多孔层,模拟含乙酸的乙二醇溶液蒸发沸腾工况,并借助扫描电子显微镜(SEM)、腐蚀失重法和电化学方法对比研究了不锈钢基、铁基、铜基3种高通量换热管表面多孔层的耐腐蚀性能。结果表明,所开发的不锈钢基表面多孔层相比铁基和铜基表面多孔层具有更加优良的耐腐蚀性能。在沸腾浸泡实验条件下,不锈钢基多孔层的腐蚀速率约为铁基多孔层腐蚀速率的1/5~1/3,为铜基多孔层的3/10~4/7。在0.1~10mol/L的实验浓度范围内,常温下不锈钢基多孔层耐蚀性随着乙酸浓度的增加而降低,但仍明显优于铁基、铜基多孔层。
[Abstract]:Porous high flux surface heat transfer tube is an efficient boiling heat transfer element. In order to improve the corrosion resistance of surface porous high flux heat transfer tube, In this paper, a layer of stainless steel porous layer was sintered on the surface of stainless steel heat exchanger tube by powder sintering process, and the boiling condition of ethylene glycol solution containing acetic acid was simulated. The corrosion resistance of three kinds of porous layers on the surface of stainless steel, iron and copper were studied by means of scanning electron microscope (SEM), corrosion weight loss method and electrochemical method. The results showed that the corrosion resistance of porous layers on the surface of stainless steel, iron and copper was compared. The porous layer of stainless steel substrate has better corrosion resistance than that of iron and copper based porous layer. Under the condition of boiling immersion experiment, the corrosion resistance of porous layer on stainless steel substrate is better than that on iron base and copper base surface. The corrosion rate of stainless steel based porous layer is about 1 / 5 / 1 / 3 of that of iron based porous layer, which is 3 / 10 / 4 / 7 of copper based porous layer. In the experimental concentration range of 0.1 渭 mol / L, the corrosion resistance of stainless steel based porous layer decreases with the increase of acetic acid concentration at room temperature. But it is still better than iron base, copper base porous layer.
【作者单位】：华东理工大学化学工程联合国家重点实验室;中国石化扬子石油化工有限公司;无锡化工装备股份有限公司;
【基金】：中石化科技开发项目(316092)
【分类号】：TQ051.5

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