Effect of microstructure variation on the corrosion behavior of high-strength low-alloy steel in 3.5wt% NaCl solution

Abstract

The effect of microstructure variation on the corrosion behavior of high-strength low-alloy (HSLA) steel was investigated. The protective property of the corrosion product layer was also explored. Experimental results reveal that the type of microstructure has significant effect on the corrosion resistance of HSLA steel. The measurement results of weight loss, potentiodynamic polarization curves, and electrochemical impedance spectroscopy indicate that the steel with acicular ferrite microstructure exhibits the lowest corrosion rate. Martensite exhibits a reduced corrosion resistance compared with polygonal ferrite. It is found that the surface of the acicular ferrite specimen uniformly covered by corrosion products is seemingly denser and more compact than those of the other two microstructures, and can provide some amount of protection to the steel; thus, the charge transfer resistance and modulus values of the acicular ferrite specimen are the largest. However, corrosion products on martensite and polygonal ferrite are generally loose, porous, and defective, and can provide minor protectiveness; thus, the charge transfer resistance values for polygonal ferrite and martensite are lower.

Keywords

high-strength low-alloy steel / microstructure / corrosion / sodium chloride solutions

References

[1] Yuan W., Zhou B., Tang Y., Zhang Z.C., Deng J. Effects of environmental factors on corrosion behaviors of metal-fiber porous components in a simulated direct methanol fuel cell environment. Int. J. Miner. Metall. Mater, 2014, 21(9): 913.

[2] Zhang J.M., Sun W.H., Sun H. Mechanical properties and microstructure of X120 grade high strength pipeline steel. J. Iron Steel Res. Int, 2010, 17(10): 63.

[3] Li D.P., Zhang L., Yang J.W., Lu M.X., Ding J.H., Liu M.L. Effect of H2S concentration on the corrosion behavior of pipeline steel under the coexistence of H2S and CO2. Int. J. Miner. Metall. Mater, 2014, 21(4): 388.

[4] Niu L., Cheng Y.F. Corrosion behavior of X-70 pipe steel in near-neutral pH solution. Appl. Surf. Sci, 2007, 253(21): 8626.

[5] Liang C.H., Cao C.H., Huang N.B. Electrochemical behavior of 304 stainless steel with electrodeposited niobium as PEMFC bipolar plates. Int. J. Miner. Metall. Mater, 2012, 19(4): 328.

[6] Alizadeh M., Bordbar S. The influence of microstructure on the protective properties of the corrosion product layer generated on the welded API X70 steel in chloride solution. Corros. Sci, 2013, 70, 170.

[7] Aramaki K., Shimura T. Prevention of passive film breakdown on iron by coverage with one-dimensional polymer films of a carboxylate ion self-assembled monolayer modified with alkyltriethoxysilanes. Corros. Sci, 2004, 46(10): 2563.

[8] Deyab M.A., Abd El -Rehim S.S. Inhibitory effect of tungstate, molybdate and nitrite ions on the carbon steel pitting corrosion in alkaline formation water containing Cl- ion. Electrochim. Acta, 2007, 53(4): 1754.

[9] López D.A., Schreiner W.H., de Sánchez S.R., Simison S.N. The influence of carbon steel microstructure on corrosion layers: an XPS and SEM characterization. Appl. Surf. Sci, 2003, 207(1-4): 69.

[10] Bordbar S., Alizadeh M., Hashemi S.H. Effects of microstructure alteration on corrosion behavior of welded joint in API X70 pipeline steel. Mater. Des, 2013, 45, 597.

[11] Smith Y.E., Coldren A.P., Cryderman R.L. Toward Improved Ductility and Toughness, 1972, Tokyo, Climax Molybdennum Company (Japan) Ltd., 119.

[12] Du C.W., Li X.G., Liang P., Liu Z.Y., Jia G.F., Cheng Y.F. Effects of microstructure on corrosion of X70 pipe steel in an alkaline soil. J. Mater. Eng. Perform, 2009, 18(2): 216.

[13] Zhang G.A., Cheng Y.F. Micro-electrochemical characterization of corrosion of welded X70 pipeline steel in near-neutral pH solution. Corros. Sci, 2009, 51(8): 1714.

[14] Cheng Y.F. Studies of X-65 pipeline steel corrosion in solutions containing carbon dioxide by electrochemical technique. Bull. Electrochem, 2005, 21, 503.

[15] Asher S.L., Leis B., Colwell J., Singh P.M. Investigating a mechanism for transgranular stress corrosion cracking on buried pipelines in near-neutral pH environments. Corrosion, 2007, 63(10): 932.

[16] Shin S.Y., Hwang B., Lee S., Kim N.J., Ahn S.S. Correlation of microstructure and Charpy impact properties in API X70 and X80 line-pipe steels. Mater. Sci. Eng. A, 2007, 458(1-2): 281.

[17] Zhang Y.L., Du M., Zhang J., Du J.Q. Corrosion behavior of X65 carbon steel in simulated oilfield produced water. Mater. Corros, 2015, 66(4): 366.

[18] Huo J., Liu Y.C., Zhang D.T., Yan Z.S., Gao Z.M. Isochronal phase transformations of low-carbon high strength low alloy steel upon continuous cooling. Steel Res. Int, 2013, 84(2): 184.

[19] Mora-Mendoza J.L., Turgoose S. Fe3C influence on the corrosion rate of mild steel in aqueous CO2 systems under turbulent flow conditions. Corros. Sci, 2002, 44(6): 1223.

[20] Guo J., Yang S.W., Shang C.J., Wang Y., He X.L. Influence of carbon content and microstructure on corrosion behaviour of low alloy steels in a Cl–containing environment. Corros. Sci, 2009, 51(2): 242.

[21] Nam N.D., Kim M.J., Jang Y.W., Kim J.G. Effect of tin on the corrosion behavior of low-alloy steel in an acid chloride solution. Corros. Sci, 2010, 52(1): 14.

[22] Qin Z., Demko B., Noël J., Shoesmith D., King F., Wrothingham R., Keith K. Localized dissolution of millscale-coverd pipeline steel surfaces. Corrosion, 2004, 60(10): 906.

[23] Sherar B.W.A., Power I.M., Keech P.G., Mitlin S., Southam G., Shoesmith D.W. Characterizing the effect of carbon steel exposure in sulfide containing solutions to microbially induced corrosion. Corros. Sci, 2011, 53(3): 955.

[24] Ma Y.T., Li Y., Wang F.H. Weatherability of 09CuPCrNi steel in a tropical marine environment. Corros. Sci, 2009, 8(51): 1725.

[25] Du C.W., Li X., Wu J., Song Y.Q., Xu J. Corrosion behavior comparison of X70 steel in three different environments. J. Univ. Sci. Technol. Beijing, 2004, 26(5): 529.

[26] Zhang L.M., Ding R.M., Yang J.W., Lu M.X. Analysis of corrosion scales on X60 steel under high H2S/CO2 content environments. J. Univ. Sci. Technol. Beijing, 2009, 31(5): 563.

[27] Zhou X.S., Liu C.X., Yu L.M., Liu Y.C., Li H.J. Phase transformation behavior and microstructural control of high-Cr martensitic/ferritic heat-resistant steels for power and nuclear plants: a review. J. Mater. Sci. Technol, 2015, 31(3): 235.

[28] Hemmingsen T., Hovdan H., Sanni P., Aagotnes N.O. The influence of electrolyte reduction potential on weld corrosion. Electrochim. Acta, 2002, 47(24): 3949.