Naphthenic Acid Corrosion Behavior of 20G and Cr5Mo under High Temperature

Naphthenic acid corrosion is a kind of corrosion state that occurs frequently in the high temperature locations of the petroleum distillation and secondary processing units. It is the main factor influencing the long-cycle safe operation of petrochemical plants, and also one of the hottest issues to be solved urgently in the petroleum refining industry. This paper overviewed the research progress related to high temperature naphthenic acid corrosion including the mechanisms, influencing factors, test and controlling methods; analyzed the engineering problems in the processing of high acid crude oil, pointed out the shortcomings of current research methods, and proposed the future research suggestions on the corrosion rules and prevention methods.

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High temperature naphthenic acid corrosion of SA210C and A335-P5

Materials and Corrosion ◽

10.1002/maco.201206839 ◽

2013 ◽

Vol 65 (6) ◽

pp. 619-625 ◽

Cited By ~ 5

Author(s):

R. Sixian ◽

Z. Yu ◽

P. Ziwei ◽

C. Yuwan ◽

C. Xuedong

Keyword(s):

High Temperature ◽

Acid Corrosion ◽

Naphthenic Acid

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An Acoustic Microbalance Study of High-Temperature Naphthenic Acid Corrosion of Common Iron-Alloying Elements

CORROSION ◽

10.5006/1737 ◽

2015 ◽

Vol 71 (9) ◽

pp. 1135-1146 ◽

Cited By ~ 7

Author(s):

Brian N. Patrick ◽

Rajashree Chakravarti ◽

Thomas M. Devine

Keyword(s):

High Temperature ◽

Acid Corrosion ◽

Naphthenic Acid ◽

Alloying Elements

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Study on high-temperature naphthenic acid corrosion and erosion-corrosion of aluminized carbon steel

Journal of Materials Science ◽

10.1023/b:jmsc.0000012930.04425.07 ◽

2004 ◽

Vol 39 (3) ◽

pp. 975-985 ◽

Cited By ~ 12

Author(s):

X. Q. Wu ◽

H. M. Jing ◽

Y. G. Zheng ◽

Z. M. Yao ◽

W. Ke

Keyword(s):

High Temperature ◽

Carbon Steel ◽

Acid Corrosion ◽

Naphthenic Acid ◽

Erosion Corrosion

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Study on High-Temperature Naphthenic Acid Corrosion of Type 304 and Type 316L Stainless Steel and Their Welded Joints

Volume 5: High Pressure Technology; Nondestructive Evaluation Division; Student Paper Competition ◽

10.1115/pvp2009-77351 ◽

2009 ◽

Cited By ~ 2

Author(s):

Zhou Fang ◽

Zhiping Chen ◽

Lei Wang

Keyword(s):

Stainless Steel ◽

High Temperature ◽

Welded Joints ◽

316L Stainless Steel ◽

Acid Corrosion ◽

Naphthenic Acid ◽

Liquid Media ◽

Type 316L ◽

Type 304 ◽

Type 316L Stainless Steel

High-temperature naphthenic acid corrosion (HNAC) behaviors of type 304 and type 316L stainless steel have been investigated in the laboratory with the experimental devices, that were designed and built by ourselves and had applied a patent, to evaluate the resistance of the base metal and their welded joints to the HNAC. Corrosion dependencies on the test temperature (ranging 220–320°C), total acid number (TAN) (ranging 1.86–32.0 mg KOH/g) and media physical states (liquid or vapor) were assessed. Specimens after HNAC tests were characterized by field emission scanning electron microscopy (FESEM) and energy dispersive X-ray (EDX) spectroscopy. A database of corrosion rates of type 304 and type 316L steel in high-temperature naphthenic acid solution was established. It was found that the HNAC resistance of both type 304 and type 316L degraded rapidly with increasing temperature and TAN. The tests which were conducted simultaneity in liquid media and gas media revealed that both the type 304 and type 316L stainless steel with weld showed worse HNAC compared to the type 304 and type 316L base metal at all temperatures in liquid media, but the difference between them was not obvious. In gas media, the HNAC rates of the type 304 and type 316L stainless steels with welds were greater than those without welds.

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Experiment Study of High-Temperature and High-Flow Rate Naphthenic Acid Corrosion

ASME 2011 Pressure Vessels and Piping Conference: Volume 6, Parts A and B ◽

10.1115/pvp2011-57640 ◽

2011 ◽

Cited By ~ 1

Author(s):

Ke Jiang ◽

Xuedong Chen ◽

Tiecheng Yang ◽

Zongchuan Qin

Keyword(s):

Stainless Steel ◽

High Temperature ◽

Corrosion Rate ◽

Flow Rate ◽

Acid Corrosion ◽

Naphthenic Acid ◽

High Flow ◽

High Flow Rate ◽

Experimental Results ◽

Wall Turbulence

The corrosion behaviors of 321 and 316L austenitic stainless steel in high-temperature and high-flow rate naphthenic acid medium were investigated by pipe-flow and jet-impingement method. The influence of temperature and erosion angle on naphthenic acid corrosion resistance for stainless steel was analyzed. The results indicate that the naphthenic acid corrosion rate increased with increasing temperature and velocity. At the same temperature, the corrosion rate at 90° erosion angle is greater than that at 0°. The present experimental results are very close to those in API 581. Simulation results indicate that, where the mutation of flow direction occurs around the specimen, the near-wall turbulence intensities are very large by both experimental methods. Moreover, by comparing both the simulation and experimental results, it can be found that the naphthenic acid corrosion is very severe in areas of high turbulence.

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