Zobrazeno 1 - 10
of 147
pro vyhledávání: '"Howard W. Pickering"'
Publikováno v:
Electrochimica Acta. 56:1719-1728
Experimental results are presented for the induction period that precedes the onset of crevice corrosion. In situ visual examination and ex situ microscopy revealed that the first corrosive attack on the (passive) crevice wall occurs as a pit near th
Autor:
Howard W. Pickering
Publikováno v:
Zeitschrift für Physikalische Chemie. 221:1441-1454
This paper describes work related to Konrad G. Weil's research interests while a visiting scholar in the Pickering Laboratory at Penn State University in the period, 1991–2003. Specifically, this paper describes the role of IR voltage in (i) causin
Autor:
Howard W. Pickering, A.M. Al-Zahrani
Publikováno v:
Electrochimica Acta. 50:3420-3435
This paper investigates the induction period preceding crevice corrosion in the spontaneously passive iron/0.2 M Na 2 SO 4 + 0.025 M K 2 CrO 4 (pH 9) system. The focus is on the interaction between pH, corrosion products and the IR > Δ ϕ * criterio
Publikováno v:
The Journal of Physical Chemistry B. 108:14298-14304
Electrochemical microprobes for monitoring of the electrochemical conditions inside recesses are needed to better understand how localized corrosion and other charge-transfer processes occur in confined spaces. The electrode potential distribution ca
Publikováno v:
Electrochimica Acta. 48:3565-3572
This paper demonstrates the use of the new Iyer/Pickering/Zamanzadeh/Al-Faqeer (IPZA) analysis to determine the effect of the iodide surface coverage (θI−) on the hydrogen surface coverage (θH) and the rate constants of the hydrogen evolution rea
Publikováno v:
Electrochimica Acta. 46:3835-3840
A 70% Sn–30% Zn layer is deposited from a neutral non-cyanide bath. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) show that it is composed of Sn and Zn phases. By use of an electrochemical quartz crystal microbal
Publikováno v:
JOM. 53:42-46
This paper presents some recent findings on localized corrosion with a focus on Al 6XXX alloys and on the current times resistance (IR) voltage that exists between the separated anodic and cat hodic reactions. Some newly developed concepts help quant
Publikováno v:
CORROSION. 57:428-432
Effects of thiosulfate (S2O32−) and sulfite (SO32−) on hydrogen evolution and permeation within iron have been studied in acid and neutral solutions. Results show that thiosulfate increases the hydrogen permeation rate and depolarizes the hydroge
Publikováno v:
CORROSION. 56:979-982
Effect of a crevice on the breakdown potentials (Eb) of carbon steel specimens in pH 12.6 saturated calcium hydroxide (Ca[OH]2) solution (SCS) and pH 13.6 simulated concrete pore solution (SPS) with 0.01 M to 1.0 M chloride concentration ([Cl−]) wa
Publikováno v:
Journal of The Electrochemical Society. 146:2853-2862
An iteration method for computing the nonuniform potential and current distributions at a partially passivated disk electrode is introduced. The computation method is developed for a small cathode in the vicinity of a much larger anode, a situation e