EFFECT OF DIFFERENT SURFACE TREATMENTS ON THE OXIDE BEHAVIOR AND ANTI-COKING PROPERTY OF THE PACK ALUMINIZED ALLOY
To avoid more economic loss in ethylene cracking industry for coke deposited on furnace tube, an effective way is to change surface condition in order to significantly reduce the catalytic element which can cause coke deposition heavily. This study is aimed at the oxidation of aluminized HP40 alloy with different surface condition like blasting and polish. The cross-section of oxide layers and aluminized coatings with different treatments were analyzed by using scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EOX) and X-ray diffraction (XRD). Results show that the pack aluminized layer is composed of FeAl with a small amount of Fe3 Al. The oxides formed on the aluminized samples with different surface roughness are all consisted of a - Al2 O3, β - Al2 O3. Surface roughness can significantly affect on the oxide rate of aluminized steel and the length of the needle like oxide formed on the rough sample is longer than the smooth sample. The anti-coking test indicates that alumina has excellent coke resistance and the anti-coking ability of alumina formed on rough sample is better than the smooth sample.
pack cementation oxidation rough smooth coke deposition
XING Linlin ZHENG Yanjun CUI Lishan SHAO Mingzeng YANG Wenwen
Departments of Materials Science and Engineering,China University of PetroleumBeijing,China Departments of M aterials Science and Engineering,China University of Petroleum Beijing,China Departments of Materials Science and Engineering,China University of Petroleum Beijing,China
国际会议
The 3rd World Conference on Safety of Oil and Gas Industry(第三届世界石油天然气工业安全会议 WCOGI 2010)
北京
英文
661-667
2010-09-27（万方平台首次上网日期，不代表论文的发表时间）