The Determination of the Corrosion Rate of Steel Embedded in Concrete by the Polarization Resistance and AC Impedance Methods

2008 ◽  
pp. 43-43-21 ◽  
Author(s):  
C Andrade ◽  
V Castelo ◽  
C Alonso ◽  
JA González
Keyword(s):  
Corrosion Rate ◽  
Polarization Resistance ◽  
Ac Impedance

Determination of corrosion rate in places of insulation damage of underground pipelines

2020 ◽  
Vol 2020 (48) ◽  
pp. 35-42
Author(s):  
R.M. Dzhala ◽  
◽  
B.Ya. Verbenets’ ◽  
V.R. Dzhala ◽  
V.P. Lozovan ◽  
...  
Keyword(s):  
Corrosion Rate ◽  
Corrosion Protection ◽  
Current Distribution ◽  
Cathodic Protection ◽  
Polarization Resistance ◽  
Cathodic Polarization ◽  
Electromagnetic Method ◽  
Insulating Layer ◽  
Underground Pipelines

The electromagnetic method of non-contact current measurements makes it possible to quickly monitor the state of passive (insulating coatings) and active (cathodic polarization) corrosion protection of underground pipelines (UP); detect places of unsatisfactory insulation, determine the transient resistance and its components (resistances of soil, insulating layer, polarization) in different sections, the area of insulation damage, the current distribution of cathodic protection of UP. In combination with contact measurements of direct and alternating voltages, ohmic and polarization potentials, it is possible to determine the polarization resistance and estimate the corrosion rate.

On-Site Determination of the Polarization Resistance in a Reinforced Concrete Beam

CORROSION ◽  
1988 ◽  
Vol 44 (10) ◽  
pp. 761-765 ◽  
Author(s):  
S. Feliu ◽  
J. A. Gonzalez ◽  
C. Andrade ◽  
V. Feliu
Keyword(s):  
Reinforced Concrete ◽  
Polarization Resistance ◽  
Concrete Beam ◽  
Reinforced Concrete Beam

Determination of the corrosion rate of powder materials by electrochemical methods

2011 ◽  
Vol 47 (7) ◽  
pp. 921-925 ◽  
Author(s):  
V. I. Kichigin ◽  
O. M. Perel’man ◽  
A. I. Rabinovich ◽  
N. V. Bezmaternykh ◽  
O. P. Koshcheev
Keyword(s):  
Corrosion Rate ◽  
Electrochemical Methods ◽  
Powder Materials

Corrosion Analysis of a Fiber-Optic Transceiver Housing

2001 ◽  
Author(s):  
J. H. Lau ◽  
C. L. Jiaa ◽  
S. J. Erasmus
Keyword(s):  
Relative Humidity ◽  
Corrosion Rate ◽  
Cross Sections ◽  
Weight Change ◽  
Fiber Optic ◽  
Die Casting ◽  
Extinction Ratio ◽  
Optical Power ◽  
Zinc Alloy

Abstract The corrosion responses of a fiber-optic transceiver’s housing with zinc alloy die casting material are investigated in this study. Emphasis is placed on the determination of the weight change and corrosion rate of the housing when it is subjected to a 85% relative humidity and 85°C temperature (85%RH/85°C) test condition. Also, the average light optical power, receiver sensitivity, extinction ratio, and mask margin of transceiver modules subjected to 85%RH/85°C and 3.47V at 500, 1000, 1500, and 1600 hours are provided. Furthermore, metallography is performed on the surfaces and cross sections of the housing. Finally, measurements are made of the thickness of the oxide layer on the surfaces of the fiber-optic transceiver housing.

The Corrosion of Carbon Steel and Stainless Steel in Simulated Geothermal Media

1985 ◽  
Vol 38 (8) ◽  
pp. 1133 ◽  
Author(s):  
BG Pound ◽  
MH Abdurrahman ◽  
MP Glucina ◽  
GA Wright ◽  
RM Sharp
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Stainless Steels ◽  
Polarization Resistance ◽  
Iron Sulfide ◽  
Low Carbon Steel ◽  
Passive Films ◽  
Low Carbon ◽  
Corrosion Rates ◽  
Good Agreement

The corrosion rates of low-carbon steel, and 304, 316 and 410/420 stainless steels in simulated geothermal media containing hydrogen sulfide have been measured by means of the polarization resistance technique. Good agreement was found between weight-loss and polarization resistance measurements of the corrosion rate for all the metals tested. Carbon steel formed a non-adherent film of mackinawite (Fe1 + xS). The lack of protection afforded to the steel by the film resulted in an approximately constant corrosion rate. The stainless steels also exhibited corrosion rates that were independent of time. However, the 410 and 420 alloys formed an adherent film consisting mainly of troilite ( FeS ) which provided only limited passivity. In contrast, the 304 and 316 alloys appeared to be essentially protected by a passive film which did not seem to involve an iron sulfide phase. However, all the stainless steels, particularly the 410 and 420 alloys, showed pitting, which indicated that some breakdown of the passive films occurred.

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