...L.M. Blohm; C. Liu; R.G. Kelly AA5456-H116 undergoes accelerated localized corrosion when in a galvanic couple with cupronickel alloy C70600 (CDA 706) during ASTM G85 Appendix 2 Wet Bottom (G85 WB) testing. Surface and subsurface damage of AA5456-H116 and the region of protection of the C70600 were...

...R.S. Marshall; R.G. Kelly; A. Goff; C. Sprinkle Aerospace structures often involve dissimilar materials to optimize structural performance and cost. These materials can then lead to the formation of galvanic couples when moisture is present. Specifically, noble metal fasteners (such as SS316...

... with an increase in chemical uniformity as determined by electrochemical impedance spectroscopy, gravimetric mass loss, and H₂ gas collection. Overall, limited galvanic coupling was observed between weld zones resulting in an order of magnitude reduction in galvanic corrosion rate. The galvanic...

... alloys. The galvanic coupling between electrochemically connected weld zones was investigated in 0.6 M NaCl, 0.6 M NaCl saturated with Mg(OH)₂, and tris(hydroxymethyl)aminomethane (TRIS). Anodically-induced cathodic activation was also investigated after 3 h, 24 h, and 48 h immersion times...

...M. Curioni; R.A. Cottis; G.E. Thompson To investigate the effects of galvanic coupling between dissimilar materials by electrochemical noise methods, an approach based on the use of an array of electrodes comprising two dissimilar pairs of identical electrodes is proposed. The individual currents...

..., University of Quebec at Chicoutimi (UQAC), 555 boul. Université Est, Saguenay, Quebec, CANADA, G7H 2B1. 18 3 2011 6 7 2011 © 2011 NACE International 2011 Al-B₄C metal matrix composite corrosion electrochemical impedance spectroscopy galvanic coupling pitting...

...N. LeBozec; J.-L. Baudoin; V. Orain; D. Thierry Blistering on painted materials has been reported during the last decade by different automotive makers. It has been shown that the origin of blistering was from galvanic coupling and the use of conductive rubber in strips used for insulation...

... 1 2010 NACE International 2001 acetic acid elemental sulfur galvanic coupling hydrogen embrittlement cracking hydrogen sulfide nickel-based alloys passivity polarization precipitation-hardenable alloys sour gas stainless steels stress corrosion cracking sulfide stress...

... of a downhole tubular was associated with a decrease in temperature. Cold-worked DSS tubulars often are used in conjunction with a carbon steel casing and consequently these materials may be galvanically coupled. Ideally, the annulus between the tubular and the casing should be filled with inhibited...

...G. Salvago; G. Bollini Growth of calcareous deposits on stainless steels (SS) exposed to seawater under cathodic protection (CP) conditions was examined. CP was performed by galvanic coupling with iron, zinc, or magnesium anodes. The influence of the galvanic coupling period on the temporal...

... of the cathodic reaction. In addition to spatial separation of the production of Fe²⁺ and HCO₃^–, galvanic coupling between the steel and cementite (Fe₃C) layers is the principal cause of internal acidification in these layers, since the HCO₃^– ions...

... of corrosion current. The same trend was noticed for aluminum but with a less dramatic effect. The corrosion mechanism was suggested result from galvanic coupling of the matrix and the second phase. The galvanic corrosion, however, was reduced strongly by passivation of the matrix as a result...

... will occur only in H₂S environments at coupling currents > 100 μA/cm². Nevertheless, currents of this magnitude may be realized in practice. June 1996 1 2010 NACE International 1997 carbon steel duplex stainless steel galvanic coupling hydrogen hydrogen...

... Al alloys that contained nonequilibrium concentrations of molybdenum (Mo) were developed as the matrix for Gr-Al composites using co-sputter deposition. Corrosion testing included potentiodynamic polarization and galvanic coupling of as-sputtered (AS) and heat-treated (HT) alloys. Polarization...

...M.E. Armacanqui; D.E. Harasyn Galvanic coupling and hydrogen permeation experiments were performed in a Devanathan-Stachurski cell to measure simultaneously the galvanic currents and the hydrogen permeation currents in an attempt to determine the extent of hydrogen charging into noble metals...