Calibration by gravimetric losses of electrochemical corrosion rate measurement using modulated confinement of the current

2005 ◽  
Vol 38 (9) ◽  
pp. 833-841 ◽  
Author(s):  
C. Andrade ◽  
I. Martínez
Keyword(s):  
Corrosion Rate ◽  
Electrochemical Corrosion ◽  
Rate Measurement ◽  
Corrosion Rate Measurement

Electrochemistry of Active Chromium: Part 1—Anomalous Corrosion and Products of Chromium Dissolution in Deaerated Sulfuric Acid

CORROSION ◽  
2004 ◽  
Vol 60 (3) ◽  
pp. 297-303 ◽  
Author(s):  
D. M. Dražić ◽  
J. P. Popić
Keyword(s):  
Sulfuric Acid ◽  
Corrosion Rate ◽  
Electrochemical Corrosion ◽  
Metal Corrosion ◽  
Chemical Dissolution ◽  
Rate Measurement ◽  
Electrochemical Processes ◽  
Corrosion Rate Measurement ◽  
Anomalous Dissolution

Abstract Chromium corroding in deaerated aqueous solution of sulfuric acid (H2SO4; pH 1 to 3) produces Cr(II) and Cr(III) ions simultaneously in the ratio 7:1, as well as H2. The corrosion potentials of electrochemically activated chromium are determined by the electrochemical processes as expected according to the Wagner-Traud model. However, the real rates of chromium corrosion determined by collecting evolved hydrogen, spectrophotometric determination of the accumulated Cr ions in the solution, or by weight-loss measurements are higher than the electrochemical dissolution rate by up to 12 times for pH 1.0. The effect is smaller for higher pH. This was due to the simultaneous “anomalous” (or chemical) dissolution process of the direct chemical reaction of Cr with H2O molecules, as proposed some time ago by Kolotyrkin and coworkers. Since “anomalous” dissolution cannot be detected by electrochemical means, it has been pointed out that in the presence of “anomalous” dissolution processes during metal corrosion, electrochemical corrosion rate measurements should be taken only as approximate, while the level of approximation should be determined by some other direct corrosion rate measurement method.

Potential step voltammetry: An approach to corrosion rate measurement of reinforcements in concrete

2020 ◽  
Vol 110 ◽  
pp. 103590
Author(s):  
J.E. Ramón ◽  
J.M. Gandía-Romero ◽  
R. Bataller ◽  
M. Alcañiz ◽  
M. Valcuende ◽  
...  
Keyword(s):  
Corrosion Rate ◽  
Rate Measurement ◽  
Potential Step ◽  
Corrosion Rate Measurement

Continuous corrosion rate measurement by noise resistance calculation

2001 ◽  
Vol 50 (5) ◽  
pp. 1059-1065 ◽  
Author(s):  
A. Lowe ◽  
H. Eren ◽  
Y.J. Tan ◽  
B. Kinsella ◽  
S. Bailey
Keyword(s):  
Corrosion Rate ◽  
Rate Measurement ◽  
Noise Resistance ◽  
Corrosion Rate Measurement
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