000 01746nab a2200205 4500
005 20260520000937.0
008 260224s2009 xxu
245 0 0 _aCorrosion control of type 316L stainless steel in sulfamic acid cleaning solutions
260 _a
_b
_cjul. 2009
270 _a03/08/2010 ; 03/08/2010
300 _a10 p. ; 491-500
520 _aTranscripción del resumen del autor. An investigation was conducted to better understand the corrosion behavior of Type 316L (UNS S31603) stainless steel in sulfamic acid (NH2HSO3) cleaning solutions and the relative merits of traditional corrosion control strategies. Gravimetric and electrochemical measurements in deaerated and uninhibited 10 wt% NH2HSO3 at 65°C revealed that corrosion proceeds in an active state and involves hydrogen evolution as the dominant cathodic process. Effective corrosion control attained through passivity can be attained through either anodic polarization or the addition of a chemical passivator (dissolved oxygen in this case). Upgrading to the more corrosion-resistant Type 2205 duplex stainless steel (UNS S32205) was not considered reliable because this alloy exhibited borderline passivity. Electrochemical and x-ray photoelectron spectroscopy (XPS) surface microanalytical measurements revealed that the effective corrosion control attained through the addition of a commercial diethylthiourea-containing organic inhibitor was related to the manner in which the absorbed diethylthiourea inhibits the hydrogen evolution reaction kinetics.
581 _a7
773 0 _tCorrosion
_g65
942 _cARTICULO
100 1 _aKish, J.R.
_933044
100 1 _aStead, N.J.
_941526
100 1 _aSingbeil, D.L.
_941527
999 _c175694
_d175694