Influence of surface roughness on the electrochemical behavior of carbon steel

The effect of the surface roughness of carbon steel on corrosion properties was investigated using electrochemical tests, and surface and Kelvin probe force microscopy (KPFM) analyses. The results of electrochemical tests show that the corrosion rate of carbon steel is increased as the surface roughness increases. It was estimated using KPFM measurement that the difference in the Volta potential between the peak and the valley increased with increasing surface roughness. As the peak has a lower potential than that of the valley, the peak acts as an anode. The surface roughness affects the Volta potential, and the Volta potential difference is inversely proportional to electron work function (EWF). The larger difference in Volta potential between the peak and valley on the rougher surface and the smaller EWF accelerated the micro-galvanic corrosion between them. The surface analyses reveal that corrosion initiated along the peak lines. The results from this study suggest that an increase of surface roughness leads to a decrease of the corrosion resistance.

[1]  R. Smoluchowski.  Anisotropy of the Electronic Work Function of Metals , 1941 .

[2]  Walter Kohn,et al.  Surface-Dipole Barriers in Simple Metals , 1973 .

[3]  M. Tomkiewicz,et al.  Porous Electrodes I . Numerical Simulation Using Random Network and Single‐Pore Models , 1984 .

[4]  T. Pajkossy,et al.  Fractal dimension and fractional power frequency-dependent impedance of blocking electrodes , 1985 .

[5]  G. Wright,et al.  The Corrosion of Carbon Steel and Stainless Steel in Simulated Geothermal Media , 1985 .

[6]  Denny A. Jones.  Principles and prevention of corrosion , 1991 .

[7]  T. Tani,et al.  Effects of surface roughness and patches on the work function of cobalt , 1994 .

[8]  David Talbot,et al.  Corrosion science and technology , 1997 .

[9]  G. Frankel,et al.  Corrosion Study of AA2024‐T3 by Scanning Kelvin Probe Force Microscopy and In Situ Atomic Force Microscopy Scratching , 1998 .

[10]  J. Hendrikse,et al.  Theory and application of the material work function for chemical sensors based on the field effect principle , 1998 .

[11]  Howard W. Pickering,et al.  Interpretation of impedance data for reinforcing steel in alkaline solution containing chlorides and acetates , 1998 .

[12]  W. R. Salaneck,et al.  Characterisation of the properties of surface-treated indium-tin oxide thin films , 1999 .

[13]  Robert A. Cottis,et al.  Electrochemical impedance and noise , 1999 .

[14]  Junji Itoh,et al.  Field emission from flat metal surfaces covered with Ba atoms , 1999 .

[15]  Pierre R. Roberge,et al.  Handbook of Corrosion Engineering , 1999 .

[16]  M. Schütze.  Corrosion and environmental degradation , 2000 .

[17]  J-G. Kim,et al.  Corrosion Characteristics of Rigid Polyurethane Thermally Insulated Pipeline with Insulation Defects , 2002 .

[18]  M. Bestetti,et al.  Unified approach to localized and general corrosion of stainless steels , 2002 .

[19]  S. Sánchez,et al.  The influence of steel microstructure on CO2 corrosion. EIS studies on the inhibition efficiency of benzimidazole , 2003 .

[20]  E. Juzeliunas,et al.  Study of initial stages of Al–Mg alloy corrosion in water, chloride and Cu(II) environment by a scanning Kelvin probe and XPS , 2003 .

[21]  D. C. Silverman.  The Rotating Cylinder Electrode for Examining Velocity-Sensitive Corrosion—A Review , 2004 .

[22]  Francesca Guidi,et al.  Tryptamine as a green iron corrosion inhibitor in 0.5 M deaerated sulphuric acid , 2004 .

[23]  D. Worsley,et al.  Inhibition of corrosion-driven organic coating delamination on zinc by polyaniline , 2004 .

[24]  A Amirfazli,et al.  A thermodynamic approach for determining the contact angle hysteresis for superhydrophobic surfaces. , 2005, Journal of colloid and interface science.

[25]  W. Li,et al.  Effect of surface geometrical configurations induced by microcracks on the electron work function , 2005 .

[26]  W. Li,et al.  On the correlation between surface roughness and work function in copper. , 2005, The Journal of chemical physics.

[27]  Weiwei Li,et al.  Variation of surface morphology and electronic behavior under dynamic tensile conditions , 2006 .

[28]  S. Szunerits,et al.  Study of the atmospheric corrosion of galvanised steel in a micrometric electrolytic droplet , 2006 .

[29]  Dongyang Li,et al.  Influence of surface morphology on corrosion and electronic behavior , 2006 .

[30]  J. Duszczyk,et al.  Microgalvanic activity of an Mg–Al–Ca-based alloy studied by scanning Kelvin probe force microscopy , 2007 .

[31]  A. Amirfazli,et al.  Microtextured superhydrophobic surfaces: a thermodynamic analysis. , 2007, Advances in colloid and interface science.

[32]  D. Thierry,et al.  Application of Volta potential mapping to determine metal surface defects , 2007 .

[33]  M. Thompson,et al.  Work-function measurement by high-resolution scanning Kelvin nanoprobe , 2007 .

[34]  Adam Kiejna,et al.  Structural, electronic, and magnetic properties of bcc iron surfaces , 2007 .

[35]  H. Vezin,et al.  Enhanced corrosion resistance of carbon steel in normal sulfuric acid medium by some macrocyclic polyether compounds containing a 1,3,4-thiadiazole moiety: AC impedance and computational studies , 2009 .

[36]  Mike Graham,et al.  Book Review: Shreir's Corrosion , 2012 .

[37]  Effect of Specimen Area on the Corrosion Rate of Low Alloy Steel , 2010 .

[38]  Jung-Gu Kim,et al.  Effect of niobium on the corrosion behaviour of low alloy steel in sulfuric acid solution , 2010 .