1、1,22,332(1.430077;2.4300793.110016:Arrhenius:TG174.4:A:100545372009060481-061(crude oil quality group201010%19987.5%300112360390320220482296:48348429 /mol·L1mgKOH/g Liquid Vapor6:485486 ( 2002, 22(5: 257-263 7 Wu X Q, Jina H M, Zheng Y G, et al. Study on corrosion and erosion-corrosion behavior

2、s of carbon steel in naphthenic acid mediums at high temperature J. J. Chin. Soc. Corros. Prot., 2002, 22(5: 257-263 ( , , . J. , 2002, 22(5: 257-263 8 Wu X R, Jing H M, Zheng Y G, et al. Study on high-temperature naphthenic acid corrosion and erosioncorrosion of aluminized carbon steel J. J. Mater.

3、 Sci., 2004, 39(11: 975-985 9 Qu D R, Zheng Y G, Ke W. Correlation between the cor- ¦ Æ«É Ä 29 ¥ , © , ØÍ¿ . ųºµÁ˨ ¿¿ rosivity of naphthenic acids and their chemical structures J. Anti-Corros. Methods Ma

4、ter., 2007, 54(2: 211-218 Ë» ¡ ²¹´ J. © ÆÌ¢Ç , ËÌ ¥©µ Æ « ¥ © ØÍ¿ © ÆÌ¢Ç 10 Qu D R, Zheng Y G, Yao H M, et al. High temperature naphthenic acid corrosion and su

5、lphidic corrosion of Q235 and 5Cr1/2Mo in synthetic rening media J. Corros. Sci., 2006, 48: 1960-1985 11 Jayaraman A, Saxena R C. Corrosion and its control in petroleum reneries-a review J. Corros. Prev. Control, 1995, 14 (12: 123-131 12 Gao Y M, Cheng J J, Yu G. Corrosion mechanism of A3 steel in n

6、aphthenic acid J. Corros. Sci. Prot. Technol, 2000, 12(1: 27-29 ( , , . A3 J. , 2000, 12(1: 27-29 Ð È ËÌ × Æ Ì¢Ç ± Æ ¬ HIGH TEMPERATURE NAPHTHENIC ACID CORROSION OF STEEL IN HIGH TAN REFINING MEDIA YU Jianfei1,2 , GAN Fuxing2,3 , HAO Long3

7、, CHEN Zhiliang2 (1. Hubei Electric Power Testing & Research Institute, Wuhan 430077; 2. School of Resource and Environmental Science, Wuhan University, Wuhan 430079; 3. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 A

8、bstract: Corrosion behavior of carbon steel and stainless steel in white oil with naphthenic acid were studied under high temperature by mass loss method and surface analysis. Naphthenic acid corrosion (NAC rates were directly related to experimental temperature and total acid number (TAN. The activ

9、ation energy was calculated and the process kinetics could be represented by Arrhenius-type equation. The relationship between the isothermal line in liquid phase and that in vapor phase at dierent TAN values had a signicant distinction with the change of temperature. The relationship between corrosion rate and square root of TAN is linear. The corrosion rate decreased sharply with the increase of exposure time from 1.5 h to 12 h, and then remained comparative steady state after 12 h. The ndings have important implications for assessing