It is well known that reinforcing steel in concrete can be protected from corrosion by forming a compact passive film on its surface in a concrete pore solution with high alkalinity. The corrosion behavior of the steel is related to its passivation and depassivation. The pH value and the Cl− concentration in a concrete pore solution are of the most important parameters affecting the passivity of reinforcing steel in concrete. In the present work, XPS analysis, linear polarization and potentiodynamic anodic polarization tests were used to study the relationship between the electrochemical corrosion behavior of reinforcing steel immersed in a simulated concrete pore solution and the chemical composition of the steel surface film. The results showed ht with the increase of the Cl− concentration or the decrease of the pH value in the solution, the corrosion potential of the steel shifted negatively and its corrosion current density rose, and the Fe2+ content of the steel surface film increased and the Fe3+ content decreased. The steel was in an active state in the solution with Cl− concentration higher than 0.6 mol/L or pH lower than 11.31, and the addition of 0.24 mol/L NaNO2 to the solution could protect steel from corrosion.
CHEN Wen
,
DU Rong-Gui
,
HU Rong-Gang
,
SHI Hai-Yan
,
ZHU Yan-Feng
,
LIN Chang-Jian
. CORRELATION BETWEEN COMPOSITION OF REINFORCING STEEL SURFACE FILM AND STEEL CORROSION BEHAVIOR IN SIMULATED CONCRETE
PORE SOLUTIONS[J]. Acta Metall Sin, 2011
, 47(6)
: 735
-742
.
DOI: 10.3724/SP.J.1037.2011.00057
[1] Kumar V. Corros Rev, 1988; 16: 317
[2] Huet B, L’Hostis V, Miserque F, Idrissi H. Electrochim Acta, 2005; 51: 172
[3] Saremi M, Mahallati E. Cem Concr Res, 2002; 32: 1915
[4] Moreno M, Morris W, Alvarez M G, Duffo G S C. Corros Sci, 2004; 46: 2681
[5] Du R G, Hu R G, Huang R S, Lin C J. Anal Chem, 2006; 78: 3179
[6] Allahkaram S R, Khodayari M. Anti–Corros Method Mater, 2008; 55: 250
[7] Bentiss F, Traisnel M, Gengembre L, Lagrenee M. Appl Surf Sci, 1999; 152: 237
[8] Olsson C O A, Agarwal P, Frey M, Landolt D. Corros Sci, 2000; 42: 1197
[9] Hermas A A. Corros Sci, 2008; 50: 2498
[10] La P Q, Bai M W, Xue Q J, Lu W M. Surf Coat Technol, 1999; 113: 44
[11] Cheng X Q, Li X G, Dong C F. Int J Miner Metall Mater, 2009; 16: 170
[12] Malik M A, Kulesza P J, Wlodarczyk R, Wittstock G, Szargan R, Bala H, Galus Z. J Solid State Electrochem, 2005; 9: 403
[13] Wu Q, Liu Y, Du R G, Lin C J. Acta Metall Sin, 2008; 44: 346
(吴 群, 刘玉, 杜荣归, 林昌健. 金属学报, 2008; 44: 346)
[14] Abreu C M, Crist´obal M J, Losada R, N´ovoa X R, Pena G, P´erez M C. Electrochim Acta, 2006; 51: 1881
[15] Neal A L, Techkarnjanaruk S, Dohnalkova A, McCready D, Peyton B M, Geesey G G. Geochim Cosmochim Acta, 2001; 65: 223
[16] Stefanov P, Stoychev D, Stoycheva M, Gonzalez–Elipe A R, Marinova T. Surf Interface Anal, 1999; 28: 106
[17] Grosvenor A P, Kobe B A, Biesinger M C, McIntyre N S. Surf Interface Anal, 2004; 36: 1564
[18] Idla K, Talo A, Niemi H E M, Forsen O, Ylasaari S. Surf Interface Anal, 1997; 25: 837
[19] Sunol J J, Bonneau M E, Roue L, Guay D, Schulz R. Appl Surf Sci, 2000; 158: 252
[20] Mullet M, Khare V, Ruby C. Surf Interface Anal, 2008; 40: 323
[21] Nassir M H, Dwyer D J. J Vac Sci Technol, 1993; 11A: 2104
[22] Golub M A, Lopata E S, Finney L S. Langmuir, 1993; 9: 2240
[23] Su W C, Iroh J O. Electrochim Acta, 1999; 44: 3321
[24] Galtayries A, Warocquier–Clerout R, Nagel M D. Surf Interface Anal, 2006; 38: 186
[25] Bonnet F, Ropital F, Lecour P, Espinat D, Huiban Y, Gengembre L, Berthier Y, Marcus P. Surf Interface Anal, 2002; 34: 418
[26] Montemor M F, Simoes A M P, Ferreira M G S. Cem Concr Compos, 2003; 25: 491
[27] Kim Y J. Corrosion, 1999; 55: 81
[28] Schroeder V, Devine T M. J Electrochem Soc, 1999; 146: 4061
[29] Yin Z F, Zhao W Z, Bai Z Q, Feng Y R, Zhou W J. Electrochim Acta, 2008; 53: 3690
[30] Atenas G M, Mielczarski E, Mielczarski J A. J Colloid Interface Sci, 2005; 289: 157
