Match!

The role of internal cathodic support during the crevice corrosion of Ni-Cr-Mo alloys

Published on Sep 1, 2018in Electrochimica Acta5.38
· DOI :10.1016/j.electacta.2018.07.048
Jeffrey D. Henderson5
Estimated H-index: 5
(UWO: University of Western Ontario),
N. Ebrahimi8
Estimated H-index: 8
(UWO: University of Western Ontario)
+ 3 AuthorsJ.J. Noël14
Estimated H-index: 14
(UWO: University of Western Ontario)
Cite
Abstract
Abstract Coupling of metal oxidation in crevice corrosion to both O 2 reduction on surfaces external to the crevice and H + reduction occurring within the crevice, was studied using a galvanostatic crevice corrosion technique in conjunction with weight loss analyses. Results suggest internal H + reduction is a significant contributor to the crevice corrosion of the studied alloys in 5 M NaCl at 120 °C. Repeat experiments suggest damage can be as much as doubled by H + reduction. This process, however, can be minimized by alloying additions of Mo, which permit the deposition of Mo-rich corrosion products within an active crevice. Due to difficulties experienced during corrosion product removal, the results presented herein are anticipated to be underestimates of the actual extent of this process. Consequently, damage predictions based on the availability of O 2 and other oxidants in the service environment may significantly underestimate the actual extent of corrosion on Ni-Cr-Mo alloys.
  • References (28)
  • Citations (3)
Cite
References28
Newest
Published on Jan 1, 2017in Corrosion1.86
A.K. Mishra10
Estimated H-index: 10
,
D.W. Shoesmith27
Estimated H-index: 27
,
Paul Manning1
Estimated H-index: 1
Hydrochloric acid (HCl) is an important mineral acid with many uses, including the pickling of steel, acid treatment of oil wells, and chemical cleaning and processing. This acid is extremely corrosive and its aggressiveness can change drastically depending on its concentration, the temperature, and contamination by oxidizing impurities. One of the most commonly encountered oxidizing impurities is the ferric ion. In general, stainless steels cannot tolerate aggressive HCl solutions, hence the ne...
Published on May 1, 2016in Corrosion Science6.36
Masashi Nishimoto1
Estimated H-index: 1
(Tohoku University),
Junichiro Ogawa1
Estimated H-index: 1
(Tohoku University)
+ 2 AuthorsNobuyoshi Hara19
Estimated H-index: 19
(Tohoku University)
Abstract A sensing plate for the simultaneous measurements of pH and Cl − concentration was fabricated. Terbium–dipicolinic acid complex (Tb–DPA) and quinine sulphate were used to measure the pH and Cl − concentration, respectively. In the incubation period of the crevice corrosion, the pH inside the crevice gradually decreased from 3.0 to ca. 2.0, and the Cl − concentration increases from 0.01 to ca. 0.18 M. The generation of the micro-pit led to a sharp decrease in pH to below 0.5 and an incre...
Published on Apr 1, 2016in Corrosion Science6.36
N. Ebrahimi8
Estimated H-index: 8
(UWO: University of Western Ontario),
J.J. Noël14
Estimated H-index: 14
(UWO: University of Western Ontario)
+ 1 AuthorsD.W. Shoesmith27
Estimated H-index: 27
(UWO: University of Western Ontario)
Abstract The initiation and propagation of crevice corrosion on the BC1 nickel-chromium-molybdenum alloy has been studied galvanostatically in concentrated chloride solution at 120 °C, and the distribution of corrosion damage determined using surface analytical techniques. The distribution of damage was dependent on the applied current and showed an increased tendency to spread across the surface as the applied current was increased. Attempts to induce repassivation by galvanodynamically reducin...
Published on Jan 1, 2016in Journal of The Electrochemical Society3.12
N. Ebrahimi8
Estimated H-index: 8
(UWO: University of Western Ontario),
Pellumb Jakupi12
Estimated H-index: 12
(UWO: University of Western Ontario)
+ 3 AuthorsD.W. Shoesmith27
Estimated H-index: 27
(UWO: University of Western Ontario)
Published on Dec 1, 2015in Corrosion1.86
N. Ebrahimi8
Estimated H-index: 8
,
Pellumb Jakupi12
Estimated H-index: 12
+ 1 AuthorsD.W. Shoesmith27
Estimated H-index: 27
The roles of the alloying elements Mo, Cr, and W in resisting crevice corrosion of UNS N06022, UNS N06625, and UNS N10362 have been studied under galvanostatic conditions in 5 mol/L NaCl at 150°C. Corrosion damage patterns were investigated using surface analytical techniques such as scanning electron microscopy and optical imaging, and the corrosion products characterized by energy dispersive x-ray spectroscopy. While the Cr content of the alloy is critical in controlling initiation of crevice ...
Published on May 1, 2015in Corrosion1.86
Marcela Miyagusuku1
Estimated H-index: 1
,
Ricardo M. Carranza10
Estimated H-index: 10
,
Raul B. Rebak19
Estimated H-index: 19
Alloy 22, a nickel-based alloy that belongs to the Ni-Cr-Mo family, shows an outstanding corrosion resistance in most environments. Alloy 22 was extensively studied regarding its crevice corrosion behavior both in pure chloride solutions and in solutions containing other ions such as nitrate, sulfate, and carbonate/bicarbonate. Electrochemical tests were performed to study uniform and localized corrosion of Alloy 22 in a deaerated aqueous solution of 1 M NaCl and 1 M NaCl with different amounts ...
Published on Jan 1, 2015in Faraday Discussions3.71
Vincent Maurice7
Estimated H-index: 7
(PSL Research University),
Hao Peng1
Estimated H-index: 1
(PSL Research University)
+ 3 AuthorsPhilippe Marcus8
Estimated H-index: 8
(PSL Research University)
Surface analysis by time-of-flight secondary ion mass spectrometry, X-ray photoelectron spectroscopy and scanning tunnelling microscopy has been applied to provide new insight on Mo effects on the composition and nanostructure of the passive films grown in sulfuric acid on well-controlled Fe–17Cr–14.5Ni–2.3Mo(100) austenitic stainless steel single crystal surfaces. A duplex hydroxylated oxide matrix, 1.8–1.9 nm thick, is formed with a strong partition between Cr(III) and Fe(III) in the inner and...
Published on Jan 1, 2015in Procedia Materials Science
Edgar C. Hornus2
Estimated H-index: 2
,
Martín A. Rodríguez5
Estimated H-index: 5
+ 2 AuthorsRaul B. Rebak19
Estimated H-index: 19
(GE: General Electric)
The crevice corrosion repassivation potential was determined by the Potentiodynamic–Galvanostatic-Potentiodynamic (PD–GS–PD) method. Alloys 625, C–22, C–22HS and HYBRID–BC1 were used. Specimens contained 24 artificially creviced spots formed by a ceramic washer (crevice former) wrapped with a PTFE tape. Crevice corrosion tests were performed in 0.1 mol/L and 1 mol/L NaCl solutions at temperatures between 20 and 90 °C, and CaCl2 5 mol/L solution at temperatures between 20 and 117 °C. The crevice ...
Published on Aug 1, 2012in Electrochimica Acta5.38
Natalia S. Zadorozne2
Estimated H-index: 2
,
C. Mabel Giordano4
Estimated H-index: 4
+ 2 AuthorsRaul B. Rebak19
Estimated H-index: 19
(GE: General Electric)
Abstract The crevice corrosion kinetics of alloys C-22, C-22HS and HYBRID-BC1 was studied in several chloride solutions at 90 °C. The crevice corrosion resistance of the alloys increased with PREN (Pitting Resistance Equivalent Number), which is mainly affected by the Mo content in the alloys. The crevice corrosion kinetics of the three alloys was analyzed at potentials slightly higher than the repassivation potential. Crevice propagation was controlled by ohmic drop in the more dilute chloride ...
Cited By3
Newest
Published on Oct 1, 2019in Measurement2.79
Kalinga Simant Bal2
Estimated H-index: 2
,
Jyotsna Dutta Majumdar11
Estimated H-index: 11
,
Asimava Roy Choudhury2
Estimated H-index: 2
Abstract The laser displacement sensor scan technique proposed in the present study helps to calculate the corrosion rate (CR), and subsequently, determine the susceptibility to intergranular corrosion, without preparing separate samples for the weld zone (WZ), adjacent heat affected zone (HAZ) and unaffected base metal (BM). Processing of the displacement data collected during laser displacement sensor scan of the electron beam welded Hastelloy C-276 sample before and after the corrosion test s...
Published in Corrosion Science6.36
Jeffrey D. Henderson5
Estimated H-index: 5
(UWO: University of Western Ontario),
Antoine Seyeux21
Estimated H-index: 21
(PSL Research University)
+ -3 AuthorsPhilippe Marcus8
Estimated H-index: 8
(PSL Research University)
Abstract This paper presents insight into the structure and transport mechanisms involved in the surface oxidation of Hastelloy BC-1, gained by means of in situ time-of-flight secondary ion mass spectrometry and X-ray photoelectron spectroscopy. The native, air-formed oxide, comprising Cr-rich (inner) and Mo-rich (outer) layers, was found to be on the order of 1-2 nm thick. Oxide thickness did not change when the temperature was increased to 300 °C in oxygen atmosphere but increased to ˜ 10 nm a...
Published on Feb 1, 2019in Corrosion Science6.36
Jeffrey D. Henderson5
Estimated H-index: 5
(UWO: University of Western Ontario),
Xuejie Li1
Estimated H-index: 1
(PSL Research University)
+ 2 AuthorsK. Ogle8
Estimated H-index: 8
(PSL Research University)
Abstract The role of alloyed Mo during transpassive dissolution of four commercially available Ni-based alloys in neutral chloride solution was investigated by atomic emission spectroelectrochemistry. Time-resolved dissolution rates of Ni, Cr, Mo, and Fe were obtained as a function of applied potential. Mo enrichment occurred at the transpassive potentials and redissolved when the potential returned to the passive domain. These results suggest a mechanism of Mo enrichment and release that could ...
Published on Jan 1, 2019in Journal of The Electrochemical Society3.12
Y. Liu1
Estimated H-index: 1
,
Rebecca Schaller9
Estimated H-index: 9
+ 0 AuthorsE. Asselin1
Estimated H-index: 1