Siloxane-based thin films for corrosion protection of stainless steel in chloride media
- 235 Downloads
The corrosion protection of stainless steel (SS 316L) provided by layers of SiO2 and by siloxane-anchored self-assembled monolayer (SAMs) was assessed by cyclic voltammetry (CV) and by potentiostatic current transient in sodium chloride media. The SAMs were composed of octadecyltrimethoxysilane anchored onto a thin (1–2 nm) layer of SiO2. The initial SiO2 layer was obtained by treatment with tetraethoxyorthosilicate. Successive layers were added by applying the alkylsiloxane and then oxidatively removed by treatment using a UV-ozone cleaner. Though SAMs have been used as corrosion barriers in other contexts, it is shown that successive cycles of SAM deposition and ablation provide an extended SiO2 thin-covering layer that protects stainless steel against pitting and general corrosion.
KeywordsCorrosion barrier coatings 316L stainless steel Self assembled monolayer Pitting corrosion Potentiostatic current transient
This work was supported by a Tashtiyot Grant from the Israel Ministry of Science.
- 1.Dillon CP (1995) Corrosion resistance of stainless steel. Marcel Dekker, Inc., New YorkGoogle Scholar
- 3.Bard AJ, Parsons R, Jordan J (eds) (1985) Standard potentials in aqueous solutions, International Union of Pure and Applied Chemistry (IUPAC). Marcel Dekker, Inc, New York/BaselGoogle Scholar
- 4.Pourbaix M (1966) Atlas of electrochemical equilibria in aqueous solutions. Pergamon Press, OxfordGoogle Scholar
- 5.Davis JR (ed) (1994) ASM Specialty Handbook: Stainless Steel. ASM International, Materials ParkGoogle Scholar
- 6.Revie RW (ed) (2000) Uhlig’s corrosion Handbook. Wiley, NYGoogle Scholar
- 7.Brenda J, Little JSL (2007) Microbiologically influenced corrosion. Wiley, New YorkGoogle Scholar
- 8.Sedriks AJ (1996) Corrosion of stainless steel. Wiley-Interscience Publication, New York, USAGoogle Scholar
- 12.Ulman A (1991) An Introduction to Ultrathin Organic Films - From Langmuir-Blodgett to Self-Assembly. Academic Press, San DiegoGoogle Scholar
- 42.ASTM (2003) Standard test method for conducting cyclic potentiodynamic polarization measurements for localized corrosion susceptibility of Iron-, Nickel-, or Cobalt-Based Alloys. In: ASTM Standard G 61 Committee G01.11 on Electrochemical measurements in corrosion testing, Philadelphia, 2003Google Scholar
- 43.ASTM (2004) Standard reference test method for making potentiostatic and potentiodynamic anodic polarization measurements. In: ASTM G5 Committee G01.11 on Electrochemical measurements in corrosion testing, Philadelphia, 2004Google Scholar
- 44.Baboian R, Haynes GS (1981) Cyclic polarization measurements-experimental procedure and evaluation of test data, electrochemical corrosion testing, ASTM STP 727, USAGoogle Scholar