Pitting Inhibition by Surfactants Effect of the Charge of Headgroups

Surfactants have been tried as inhibitors of pitting corrosion of various materials such as stainless steels and aluminum alloys. In order to understand the structure-performance relationship in pitting inhibition, surfactants of different charged headgroups, i.e., anionic sodium dodecylsulfate (SDS), cationic dodecyltrimethylammonium chloride (DTAC), and nonionic Triton-X-100 (Triton), were investigated as pitting corrosion inhibitors of 304 stainless steel in neutral NaCI solutions. SDS was found to increase the pitting resistance of 304 stainless steel, while neither DTAC nor Triton showed any inhibition effect, indicating that the negative headgroup is preferred in pitting inhibition of stainless steels. To identify the inhibition mechanism, adsorption of surfactants on 304 stainless steel particles was directly measured using the batch adsorption technique. All three surfactants tested adsorbed significantly on the stainless steel, suggesting that the adsorption alone is not sufficient for pitting inhibition. Results obtained for the electrophoretic mobility of the particles in surfactant solutions showed that only SDS made the surface of the stainless steel more negative. Based on these results the inhibition effect of the surfactants is explained in terms of competitive adsorption and electrostatic interactions between surfactants and chloride ions.

[1]  P. Somasundaran,et al.  Pitting inhibition of stainless steel by surfactants: an electrochemical and surface chemical approach. , 2003, Journal of colloid and interface science.

[2]  R. Ramaraj,et al.  Synergistic corrosion inhibition by the sodium dodecylsulphate–Zn2+ system , 2002 .

[3]  F. Mansfeld,et al.  Evaluation of corrosion inhibition of brass in chloride media using EIS and ENA , 2001 .

[4]  H. Hassan,et al.  Corrosion inhibition of aluminum by 1,1(lauryl amido)propyl ammonium chloride in HCl solution , 2001 .

[5]  Imamura,et al.  Adsorption Behavior of Amino Acids on a Stainless Steel Surface. , 2000, Journal of colloid and interface science.

[6]  E. Kálmán,et al.  EQCM study of copper and iron corrosion inhibition in presence of organic inhibitors and biocides , 2000 .

[7]  S. Manov,et al.  Electrochemical study of the corrosion behaviour of zinc treated with a new organic chelating inhibitor , 2000 .

[8]  K. Aramaki,et al.  The inhibition effects of anion and cation inhibitors on corrosion of iron in an anhydrous acetonitrile solution of FeCl3 , 2000 .

[9]  K. Varga,et al.  Coupled radiotracer and voltammetric study of the adsorption of 1-hydroxy-ethane-1,1-diphosphonic acid on polycrystalline gold , 2000 .

[10]  A. Fouda,et al.  Pitting Corrosion of Aluminium in Halide Solutions Containing Some Anionic Surfactants , 2000 .

[11]  M. Traisnel,et al.  A new triazole derivative as inhibitor of the acid corrosion of mild steel: electrochemical studies, weight loss determination, SEM and XPS , 1999 .

[12]  S. G. Roscoe,et al.  Electrochemical Studies of the Adsorption Behavior of Bovine Serum Albumin on Stainless Steel , 1999 .

[13]  J. Rubim,et al.  Effect of sodium dodecylsulfate on copper corrosion in sulfuric acid media in the absence and presence of benzotriazole , 1999 .

[14]  K. N. Han,et al.  Corrosion Inhibition of a Mild Steel by Aniline and Alkylamines in Acidic Solutions , 1998 .

[15]  P. Zelenay,et al.  Radiometric and voltammetric study of benzoic acid adsorption on a polycrystalline silver electrode , 1998 .

[16]  G. Hefter,et al.  Organic corrosion inhibitors in neutral solutions; Part 1 - Inhibition of steel, copper, and aluminum by straight chain carboxylates , 1997 .

[17]  R. Alkire,et al.  Microscopic behavior of single corrosion pits : the effect of thiosulfate on corrosion of stainless steel in NaCl , 1997 .

[18]  A. Mollica,et al.  N-Lauroyl Sarcosine Sodium Salt as a Corrosion Inhibitor for Type 1518 Carbon Steel in Neutral Saline Environments , 1996 .

[19]  A. Simões,et al.  Chemical Composition of Passive Films on AISI 304 Stainless Steel , 1994 .

[20]  R. Alkire,et al.  Use of In Situ Atomic Force Microscopy to Image Corrosion at Inclusions , 1994 .

[21]  C. Monticelli,et al.  Surface-active substances as inhibitors of localized corrosion of the aluminium alloy AA 6351 , 1991 .

[22]  G. Trabanelli,et al.  Inhibition of pitting corrosion of AISI 304 by organic compounds , 1987 .

[23]  A. Viehbeck,et al.  Inhibition of Pitting of Type 304L Stainless Steel by N‐Lauroylsarcosine , 1986 .

[24]  W. S. Clark,et al.  Evaluation of Corrosion Inhibitors in SO2 Scrubber Solutions , 1984 .

[25]  Digby D. Macdonald,et al.  A Point Defect Model for Anodic Passive Films II . Chemical Breakdown and Pit Initiation , 1981 .

[26]  Digby D. Macdonald,et al.  A Point Defect Model for Anodic Passive Films I . Film Growth Kinetics , 1981 .

[27]  M. Seo,et al.  Auger analysis of the anodic oxide film on iron in neutral solution , 1971 .

[28]  Norio Sato,et al.  A theory for breakdown of anodic oxide films on metals , 1971 .

[29]  M. Rychcik,et al.  Effect of sulphide inclusions in a commercial stainless steel on the nucleation of corrosion pits , 1969 .

[30]  H. Engell,et al.  Untersuchungen über den Lochfraß an passiven austenitischen Chrom-Nickel-Stählen in neutralen Chloridlösungen , 1969 .

[31]  T. Hoar,et al.  Breakdown of Passivity of Stainless Steel by Halide Ions , 1967, Nature.

[32]  K. Nobe,et al.  Theory of Organic Corrosion Inhibitors Adsorption and Linear Free Energy Relationships , 1967 .

[33]  N. Hackerman,et al.  Adsorption of Monomeric and Polymeric Amino Corrosion Inhibitors on Steel , 1965 .

[34]  D. Mears,et al.  The relationships between anodic passivity, brightening and pitting* , 1965 .

[35]  D. Fuerstenau,et al.  Surfactant Adsorption at the Solid—Liquid Interface—Dependence of Mechanism on Chain Length , 1964 .

[36]  J. M. Kolotyrkin.  Pitting Corrosion of Metals , 1963 .