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。
Porous surface high flux exchanging tube is a high efficiency heat transfer component. In order to improve the corrosion resistance of porous surface high flux exchanging tube, power sintering was adopted to develop a stainless steel-based micro-porous layer on the surface of stainless stain tube. All the experiments were conducted in the boiling ethylene glycol solution with acetic acid. With the aids of electric scanning microscope method （SEM）, corrosion weight loss method and electrochemical comparison measurement, the corrosion resistance of stainless steel-based porous layer on high flux heat exchanger tube was studied compared with copper-based and iron-based porous layer. The results show that corrosion resistance of stainless steel-based porous layer is superior to copper-based and iron-based materials. In the boiling immersion test, the mass loss rate of stainless steel-based porous layer is about 1/5--1/3 of iron-based porous layer, and 3/10--4/7 of copper-based porous layer. The corrosion resistance of stainless steel-based porous layer decreases with acetic acid concentration at the range of 0.1--10mol/L and at room temperature. Additionally, the corrosion resistance of stainless steel-based porous layer is higher than copper-based and iron-based porous layers throughout the experiment.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2017年第6期2255-2261,共7页
Chemical Industry and Engineering Progress
基金
中石化科技开发项目(316092)
关键词
不锈钢
多孔高通量换热管
乙酸
腐蚀
烧结
stainless steel
porous high flux heat exchanger tube
acetic acid
corrosion： sintering
