Simulation of The State of Carbon Steel n Years After Disposal with n Years of Corrosion Product on its Surface in a Bentonite Environment

1994 ◽  
Vol 353 ◽  
Author(s):  
Yoichi Kojima ◽  
Toshinobu Hioki ◽  
Shigeo Tsujikawa
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Corrosion Product ◽  
Corrosion Behavior ◽  
Steel Corrosion ◽  
Product Layer ◽  
The State ◽  
Corrosion Product Layer ◽  
Time Frames

AbstractThe use of bentonite as buffer and carbon steel as overpack material for the geological disposal of nuclear waste is under investigation. To better assess the long term integrity of the carbon steel overpack, a quantitative analysis of the corrosion behavior on the steel surface for time frames beyond that of feasible empirical determination is required. The state n years after disposal, consisting of Carbon Steel / Corrosion Products + Bentonite / Water, was simulated and the corrosion behavior of the carbon steel in this state investigated. The following facts became apparent. Both the corrosion rate and the non-uniformity of it increased with increase in the corrosion product content in the compacted bentonite. When the corrosion product layer was formed between the carbon steel and the bentonite, it ennobled the corrosion potential and increased the corrosion rate.

scholarly journals Corrosion behavior of HRB400 and HRB400M steel bars in concrete under DC interference

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Qingmiao Ding ◽  
Yuning Gao ◽  
Ruiyang Liu ◽  
Yaozhi Li ◽  
Lei Jin ◽  
...  
Keyword(s):  
Corrosion Product ◽  
Corrosion Behavior ◽  
Direct Current ◽  
Product Layer ◽  
Corrosion Products ◽  
Product Analysis ◽  
Experimental Conditions ◽  
Corrosion Product Layer ◽  
Steel Bars ◽  
Concrete Solution

AbstractThe influence of direct current interference on the corrosion behavior of HRB400 and HRB400M steel bars in simulated concrete solution was studied using methods such as weight loss experiment, electrochemical experiment, surface technology and product analysis. The research results showed that with the increase of DC interference voltage, the corrosion rates of HRB400 and HRB400M steel bars would increase. The corrosion resistance of HRB400M steel bars was better than HRB400 steel bars under the experimental conditions. In addition, direct current interference could cause damage to the corrosion product layer on the surface of HRB400 steel bars and HRB400M steel bars. And the corrosion form and corrosion product types of HRB400 and HRB400M steel bars would be affected by direct current interference. The main corrosion products of HRB400 steel bars included γ-FeOOH and Fe2O3 when it was not interfered by DC. When DC interference was applied, the main corrosion products included Fe3O4 and Fe2O3. The corrosion products on the surface of HRB400M steel bars were mainly Fe3O4 and Fe2O3, and the types of products increased to form Cr2O3 and MnFe2O4.

scholarly journals Evaluation Method for Corrosion Depth of Uncoated Carbon Steel and Its Time-Dependence Using Thickness of Corrosion Product Layer

2012 ◽  
Vol 61 (12) ◽  
pp. 483-494 ◽  
Author(s):  
Shigenobu Kainuma ◽  
Yuya Yamamoto ◽  
Yoshihiro Itoh ◽  
Hideyuki Hayashi ◽  
Wataru Oshikawa
Keyword(s):  
Carbon Steel ◽  
Time Dependence ◽  
Corrosion Product ◽  
Evaluation Method ◽  
Product Layer ◽  
Corrosion Depth ◽  
Corrosion Product Layer

scholarly journals To Investigate the Effect of Heat Treatment on Low Carbon Steel Corrosion Behavior

2018 ◽  
Vol 7 (3.20) ◽  
pp. 412
Author(s):  
Azhar Wahab Abdalrhem ◽  
Ali Jaber Naeemah ◽  
Makki Noori jawad
Keyword(s):  
Heat Treatment ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Low Carbon Steel ◽  
Steel Corrosion ◽  
Optical Microscope ◽  
Polarization Measurement ◽  
Material Surface ◽  
Low Carbon

This work was to investigating the corrosion behavior of low carbon steel in a salt solution of 3.5wt% NaCl after undergoing two different types of heat treatment at 960 ºC in a furnace. The material of low carbon steel was cut into nine small pieces under three groups A, B and C, without heated annealing and hardening heat treatment respectively. The heat treatment was at temperature 960ºC. The hardness of the sample as received will be 203 kg/mm2 while after hardening the hardness was increased. The sample was mounted using hot and cold mounting. The microstructure and surface morphology was observed by using Scanning Electron Microscope (SEM) and Optical Microscope (OM) after grinding, polishing and etching on the sample. In group A cementite can be observed clearly on pearlite on the surface before corrosion test. After four days soaking in 3.5 wt% NaCl solution was observed all cementite and pearlite will be transformed to austenite with the remnants of cementite make the surface unstable hence increases the initial corrosion. After four days soaking when the cementite is oxidized and a thick film of corrosion product covers the material surface. The formation of Martensite due to quenching and rapid cooling in group C sample increases the corrosion rate from 0.072 mpy to 0.302 due to decreased of corrosion potential from -572 mV to -639 mV after four days soaking. The corrosion rate of each sample was measured by using electrochemical polarization measurement and Tafel extrapolation technique. From previous result, it was observed that samples which had undergone annealing mode of heat treatment turned out to be the ones with the best corrosion resistance.  

One-Dimensional Porous Electrode Model for Predicting the Corrosion Rate under a Conductive Corrosion Product Layer

2017 ◽  
Vol 164 (11) ◽  
pp. E3372-E3385
Author(s):  
Maalek Mohamed-Said ◽  
Bruno Vuillemin ◽  
Roland Oltra ◽  
Laurent Trenty ◽  
Didier Crusset
Keyword(s):  
Corrosion Rate ◽  
Corrosion Product ◽  
Porous Electrode ◽  
Product Layer ◽  
One Dimensional ◽  
Corrosion Product Layer ◽  
Porous Electrode Model

On the bacterial communities associated with the corrosion product layer during the early stages of marine corrosion of carbon steel

2015 ◽  
Vol 99 ◽  
pp. 55-65 ◽  
Author(s):  
Isabelle Lanneluc ◽  
Mikael Langumier ◽  
René Sabot ◽  
Marc Jeannin ◽  
Philippe Refait ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Corrosion Product ◽  
Bacterial Communities ◽  
Product Layer ◽  
Marine Corrosion ◽  
Early Stages ◽  
Corrosion Product Layer

Localized corrosion of carbon steel in marine media: Galvanic coupling and heterogeneity of the corrosion product layer

2016 ◽  
Vol 111 ◽  
pp. 583-595 ◽  
Author(s):  
Ph. Refait ◽  
A.-M. Grolleau ◽  
M. Jeannin ◽  
E. François ◽  
R. Sabot
Keyword(s):  
Carbon Steel ◽  
Corrosion Product ◽  
Product Layer ◽  
Localized Corrosion ◽  
Galvanic Coupling ◽  
Corrosion Product Layer

A Case Study on Inner Corrosion of 3%Cr Casing Steel in the CO2 Environments

2017 ◽  
Vol 872 ◽  
pp. 38-42
Author(s):  
Lin Xu ◽  
Si Yang Li ◽  
Ming Biao Xu
Keyword(s):  
Weight Loss ◽  
Corrosion Rate ◽  
Corrosion Product ◽  
Product Layer ◽  
Sem Analysis ◽  
Corrosion Property ◽  
Economic Exploitation ◽  
Corrosion Reaction ◽  
Corrosion Product Layer ◽  
Corrosion Behaviors

Understanding inner corrosion property of casing steel is fundamental to safe and economic exploitation of oil & gas. In this present work, a series of corrosion tests were conducted on 3%Cr coupons derived from 9-5/8” casing. Analyses of weight loss, product morphology and composition were carried out, to investigate the corrosion behaviors caused by sweet CO2. Analysis on the weight loss showed that, with an increment of temperature from 45°C to 105°C, the corrosion rate of 3%Cr coupon firstly ascends and then arrives to the maximum at 65°C. SEM analysis demonstrated the formation of a compact corrosion product layer on the specimen surface. While increasing the exposed time increases, the corrosion rate gradually descends. The main compositions of corrosion product are Fe-Cr and Cr5O12, which can effective hinder corrosion reaction in the CO2 environment.

Corrosion processes of carbon steel in argillite: Galvanic effects associated with the heterogeneity of the corrosion product layer

2015 ◽  
Vol 182 ◽  
pp. 1019-1028 ◽  
Author(s):  
Alexandre Romaine ◽  
Marc Jeannin ◽  
René Sabot ◽  
Sophia Necib ◽  
Philippe Refait
Keyword(s):  
Carbon Steel ◽  
Corrosion Product ◽  
Product Layer ◽  
Corrosion Product Layer
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