Copper Tube Pitting Corrosion Product and Evaluation of Influence of Chloride Ion Concentration in Hot Water Environment

2020 ◽  
Vol 69 (3) ◽  
pp. 83-89
Author(s):  
Takeshi Daikuhara ◽  
Yasushiro Gomi ◽  
Naoto Nakazato ◽  
Masahiro Sakai
Keyword(s):  
Corrosion Product ◽  
Pitting Corrosion ◽  
Water Environment ◽  
Chloride Ion ◽  
Hot Water ◽  
Ion Concentration ◽  
Copper Tube

Exploration of the effect of chloride ion concentration and temperature on pitting corrosion of carbon steel in saturated Ca(OH) 2 solution

2015 ◽  
Vol 98 ◽  
pp. 708-715 ◽  
Author(s):  
Samin Sharifi-Asl ◽  
Feixiong Mao ◽  
Pin Lu ◽  
Bruno Kursten ◽  
Digby D. Macdonald
Keyword(s):  
Carbon Steel ◽  
Pitting Corrosion ◽  
Chloride Ion ◽  
Ion Concentration

scholarly journals Pitting Corrosion Properties of a Tin-Coated Copper Tube in Hot Water

1998 ◽  
Vol 47 (5) ◽  
pp. 320-325 ◽  
Author(s):  
Takahito Watanabe ◽  
Shigeru Komukai
Keyword(s):  
Pitting Corrosion ◽  
Hot Water ◽  
Copper Tube ◽  
Corrosion Properties

Effect of Inclusion on Pitting Corrosion of X80 Pipeline Steel

2015 ◽  
Vol 1120-1121 ◽  
pp. 999-1002 ◽  
Author(s):  
Feng Jun Lang ◽  
Xian Qiu Huang ◽  
Tao Pang ◽  
Ying Ma ◽  
Peng Cheng ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Pitting Corrosion ◽  
Corrosion Potential ◽  
Pipeline Steel ◽  
Chloride Ion ◽  
Steel Sample ◽  
Ion Concentration ◽  
Electrochemical Test ◽  
X80 Pipeline Steel ◽  
Atomic Force

The influence of inclusion on pitting corrosion of X80 pipeline steel was investigated by using electrochemical test and atomic force microscope. The results indicated that corrosion potential of X80 pipeline steel sample with higher grade inclusion was lower, and decreased significantly with chloride ion concentration increasing. Inclusion was not conducive to corrosion resistance of X80 pipeline steel. The way of X80 pipeline steel pitting corrosion was that pit formed at the inclusion dissolution, and grew to pitting. There were less corrosion products near the pit hole, forming a cathode ring.

scholarly journals CO2 Corrosion of Carbon Steel: The Synergy of Chloride Ion Concentration and Temperature on Metal Penetration

CORROSION ◽  
10.5006/3583 ◽  
2020 ◽  
Vol 76 (11) ◽  
Author(s):  
Frederick Pessu ◽  
Richard Barker ◽  
Anne Neville
Keyword(s):  
Carbon Steel ◽  
Pitting Corrosion ◽  
Synergistic Effects ◽  
Chloride Concentration ◽  
Chloride Ion ◽  
Corrosion Products ◽  
Ion Concentration ◽  
Co2 Corrosion ◽  
Passive Alloys ◽  
C 50

This paper investigates the synergy of chloride ion concentration and temperature on the general and pitting corrosion of carbon steel in CO2-saturated environments. Experiments were conducted over 168 h in different concentrations of NaCl brines (1 wt%, 3.5 wt%, and 10 wt%) and temperatures (30°C, 50°C, and 80°C) with the aim of elucidating the combined effect of changes in chloride ion concentration and temperature on overall metal degradation, taking into consideration general and pitting corrosion. This also includes a correlation with the formation and properties of FeCO3 corrosion products. Linear polarization resistance was implemented to monitor the electrochemical responses. Corrosion product characteristics and morphologies were studied through a combination of scanning electron microscopy and x-ray diffraction. Pitting corrosion evaluation was conducted through the application of 3D surface profilometry to study pit geometries such as the depth and diameter. The results show that general and pitting corrosion are strongly correlated to the synergistic effects of changing chloride ion concentration and temperature in carbon steel as a result of their combined influence on ferrite (Fe) dissolution and FeCO3 formation. This represents a paradigm shift from the already established mechanisms on chloride ion and temperature effects on passive alloys such as stainless steel. Increasing chloride ion concentration and temperature up to 10 wt% NaCl and 50°C to 80°C, respectively, is observed to increase the rate of Fe dissolution and formation of semiprotective FeCO3 corrosion products, leading to the increased manifestation and severity of pitting corrosion. The results also show that a “threshold chloride concentration” exists at 30°C, above which there is no significant increase in corrosion rate. However, such “threshold effects” were not observed at higher temperatures evaluated in the range of chloride concentration considered in this study.

An Electrochemical Study Of Pitting Corrosion in Stainless Steels (Part 1—Pit Growth)

CORROSION ◽  
1959 ◽  
Vol 15 (1) ◽  
pp. 48-54 ◽  
Author(s):  
N. D. GREENE ◽  
M. G. FONTANA
Keyword(s):  
Stainless Steel ◽  
Pitting Corrosion ◽  
Stainless Steels ◽  
Chloride Ion ◽  
Corrosion Current ◽  
Ion Concentration ◽  
Solution Composition ◽  
Current Interruption ◽  
Percent Nickel ◽  
First Time

Abstract By means of a unique artificial pit specimen, pit growth on 18 percent chromium-8 percent nickel stainless steel has been measured and characterized. The effects of solution composition, agitation, atmosphere, corrosion current interruption, chloride ion concentration, and inhibitor additions have been investigated. Pit interaction during pit growth has also been determined. The autocatalytic nature of pitting has been verified, and evidence of ion screening at pit sites has been experimentally observed for the first time. 3.2.2

Effect of Chloride Ion Concentration on Electrochemical Behavior and Corrosion Product of AM60 Magnesium Alloy in Aqueous Solutions

CORROSION ◽  
2012 ◽  
Vol 68 (4) ◽  
pp. 045001-1-045001-14 ◽  
Author(s):  
W. Liu ◽  
F. Cao ◽  
A. Chen ◽  
L. Chang ◽  
J. Zhang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Aqueous Solutions ◽  
Corrosion Product ◽  
Electrochemical Behavior ◽  
Chloride Ion ◽  
Ion Concentration

scholarly journals Stochastic Modeling of the Influence of Environment on Pitting Corrosion Damage of Radioactive-Waste Containers

1994 ◽  
Vol 353 ◽  
Author(s):  
Gregory A. Henshall
Keyword(s):  
Radioactive Waste ◽  
Pitting Corrosion ◽  
Chloride Ion ◽  
Corrosion Damage ◽  
Absolute Temperature ◽  
Ion Concentration ◽  
Stochastic Parameters ◽  
Physically Based ◽  
High Level ◽  
Pit Initiation

AbstractA physically-based, phenomenological stochastic model for pit initiation and growth is presented as a potential tool for predicting the degradation of high-level radioactive-waste containers by aqueous pitting corrosion. Included in the model are simple phenomenological equations describing the dependence of the controlling stochastic parameters on the applied (or corrosion) potential, chloride ion concentration, and absolute temperature. Results from this model are presented that demonstrate its ability to simulate several important environmental effects on pitting.

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