Corrosion Behavior of Super Austenitic Stainless Steel 904L Weldment in Sulfuric Acid Media Used for Leaching Application

Abstract:

This article reports the corrosion behavior of 904L weldment in sulfuric acid as a strong corrosive media. The corrosion behavior was studied by total immersion tests and potentidynamic polarization test. Total immersion test has been conducted at different acid concentrations typically: 1, 2, 4, 6, 8 and 18.4 M at 25°C. The effect of temperature (25- 100°C) on the weight loss measurements of the alloy samples was followed in the 4 M acid solution. On the other hand, potentiodynamic polarization tests were conducted in 2,5, 8 and 18.4 M H₂SO₄ solution. The potentiodynamic polarization test was also conducted in the practically used leaching medium (2 M H₂SO₄ + 10% monazite).Results show that the weight loss increases with the increase of acid concentration and reaches its maximum at 4 M H₂SO₄ and then gradually decreases. Meanwhile, the rise in temperatures results in the increase of weight loss. Potentiodynamic polarization tests indicate that the 5 M acid solution gives the highest corrosion rate of 0.6399 mm/Y. The leaching medium shows relatively higher corrosion rate (0.124 mm/y) than the corresponding 2 M H2SO4 without monazite (0.01712 mm/y).

• Periodical: Key Engineering Materials (Volume 835)
• Pages: 384-391
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.835.384
• Online since: March 2020
• Authors: Gamal M. Rashed, Waleed A. Mohrez, Abd Allah M. Abd El-Hamid, Ibrahim M. Ghayad*
• Keywords: 904L, Corrosion Resistance, Immersion Test, Polarization, Sulfuric Acid

References

[1] H. Li, Z. Jiang, H.Feng, Sh. Zhang, P.Han, W. Zhang, G Li, G.Fan. Effect of Temperature on the Corrosion Behavior of Super Austenitic Stainless Steel S32654 in Polluted Phosphoric Acid ,Int. J. Electrochem. Sci., 10, (2015), 4832 –4848.

[2] I. Iliyasu, D.S. Yawas, S.Y. Aku, Corrosion Behavior of Austenitic Stainless Steel in Sulphuric Acid at Various Concentrations,Adv. Appl. Sci. Res., 3, (6), (2012), 3909- 3915.

[3] M. Lindgren, E.H. Saarivirta, H. Peltola, J. Romu, T. Sarikka, H. Hänninen, P. Pohjanne Crevice Corrosion of Stainless Steels 904L,2205, and 2507 in High-Temperature Sulfuric Acid Solution Containing Chlorides: Influence of Metal Cations,, Corrosion,74, (2), (2018), 225-240.

DOI: 10.5006/2565

[4] T. Bellezze, G. Giuliani, G. Roventi, Study of stainless steels corrosion in a strong acid mixture. Part 1: cyclic potentiodynamic polarization curves examined by means of an analytical method,, Corros. Sci., 130, (2018), 113–125.

DOI: 10.1016/j.corsci.2017.10.012

[5] ASTM A240/A240M–17 Standard Specification for Chromium and Chromium- Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications,.

DOI: 10.1520/a0240_a0240m-13c

[6] Sh. A. Abdel-Kader, O.E. Abdel-Salam, S.A. Foad, Corrosion of some stainless and duplex stainless steel alloys in phosphoric acid plants,.MSAIJ, 4, (4), (2008), 306-312.

[7] T.K. Painkra, Kh. S. Naik, R.K. Nishad , P. K. Sen, Sh. K. Bohidar, Review about High Performance of Austenitic Stainless Steel ,, IJIRST, 1 ,(9), (2017), 93-99.

[8] G. Zou, W. Shi, S. Xiang, X. Ji, G. Ma, R.G. Ballinger Corrosion behavior of 904L austenitic stainless steel in hydrofluoric acid,, RSC Adv.,8 (2018),2811-2817.

DOI: 10.1039/c7ra12453h

[9] American Society of Mechanical Engineer, ASME BPVC. V 'Nondestructive Examination,, Liquid Penetrant Examination, Article 6, (2017), 190-194.

[10] American Society of Mechanical Engineer, ASME BPVC. V 'Nondestructive Examination,, Ultrasonic Examination Methods for Welds, Article 4, (2017),72-88.

[11] X.L. Cheng, H.Y. Ma, S.H. Chen, R. Yu, X. Chen, Z.M. Yao, Corrosion of stainless steels in acid solutions with organic sulfur- containing compounds,, Corros Sci, 41, (1999), 321-333.

DOI: 10.1016/s0010-938x(98)00125-5

[12] R.T. Loto, Pitting corrosion evaluation of austenitic stainless steel type 304 in acid chloride media,,J. Mater. Environ. Sci. 4, (4), (2013) ,448-459.

[13] Allegheny Technologies Incorporated (ATI), ATI 904L Technical Data Sheet,1 (4/18/2012).

[14] American Society of Mechanical Engineer, ASME BPVC. V 'Nondestructive Examination,, Ultrasonic Examination Methods for Welds, Article 4, (2017), 72-88.

[15] X.L. Cheng, H.Y. Ma, S.H. Chen, R. Yu, X. Chen, Z.M. Yao, Corrosion of stainless steels in acid solutions with organic sulfur- containing compounds,, Corrosion Science , 41, (1999), 321-333.

DOI: 10.1016/s0010-938x(98)00125-5

[16] R.T. Loto, Pitting corrosion evaluation of austenitic stainless steel type 304 in acid chloride media,, J. Mater. Environ. Sci. 4, (4), (2013), 448-459.

[17] Allegheny Technologies Incorporated(ATI), ATI 904LTechnical Data Sheet,1 (4/18/2012).