Localized corrosion inhibition of 304 stainless steel in pure water by oxyanions tungstate and molybdate

2004 ◽  
Vol 49 (17-18) ◽  
pp. 2779-2785 ◽  
Author(s):  
Celeste Rabaçal Alentejano ◽  
Idalina Vieira Aoki
Keyword(s):  
Stainless Steel ◽  
Corrosion Inhibition ◽  
Pure Water ◽  
Localized Corrosion ◽  
304 Stainless Steel

Corrosion Inhibitor on Copper and Stainless Steel for Component Cooling Water System of NPP

2013 ◽  
Author(s):  
Jin-hua Liu ◽  
Bin Gong ◽  
E Jang ◽  
Wei-gang Ma ◽  
Ju-hua Wen ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Inhibition ◽  
Nuclear Power ◽  
Pure Water ◽  
Water System ◽  
Cooling Water ◽  
Immersion Test ◽  
Pitting Potential ◽  
Protection Mechanism ◽  
Cooling Water System

Based on the corrosion issues of component cooling water system (CCWs) in nuclear power plant (NPP), the corrosion inhibition properties and protection mechanism on copper and stainless steel was studied by using tests such as electrochemical method, immersion test and dynamic water simulation. Results show that the optimum inhibitor is the compound of tolyltriazole (TTA) and phosphate, which has an excellent corrosion inhibition efficiency on copper in either pure water or abnormal water. The inhibitor also elevated the pitting potential of stainless steel and contributed to the corrosion resistance.

Electrochemical Measurement of Radio-Activated Metal Under High Temperature Condition

2018 ◽  
Author(s):  
Ryota Taguchi ◽  
Tomonori Ihara ◽  
Tatsuya Hazuku ◽  
Tomoji Takamasa ◽  
Sho Kano ◽  
...  
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Ion Beam ◽  
Pure Water ◽  
Reactor Core ◽  
Radiation Condition ◽  
Electrochemical Measurement ◽  
304 Stainless Steel ◽  
Electrochemical Characteristics ◽  
Water Reactors

Fundamental knowledge of electrochemical characteristics of metals under high temperature and radiation conditions is important in development of reactor core materials for light water reactors including a supercritical water-cooled reactor (SCWR). In the past studies, however, the majority of electrochemical measurements of the metals have been conducted at temperatures less than 290 °C and under a non-radiation condition. On the other hand, the radiation induced surface activation (RISA) which enhances of wettability and anticorrosive effect on metal surfaces was first revealed by authors in 1999. This study is aimed to confirm the RISA effect experimentally under high temperature conditions. The electrochemical characteristics measurement of a specimen immersed in pure water in an autoclave were performed at temperatures up to 300 °C. A normal 304 stainless-steel and a radioactivated 304 stainless-steel were used as the specimen. The radioactivated specimen was made by 140 MeV irradiation of C4+ ion beam at a cyclotron accelerator of Tohoku University in Japan. The experimental results showed that the corrosion potential of specimen was lowered due to radioactivation.

The role of Pseudomonas aeruginosa on the localized corrosion of 304 stainless steel

1993 ◽  
Vol 34 (9) ◽  
pp. 1531-1540 ◽  
Author(s):  
J. Morales ◽  
P. Esparza ◽  
S. González ◽  
R. Salvarezza ◽  
M.P. Arévalo
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Stainless Steel ◽  
Localized Corrosion ◽  
304 Stainless Steel

Localized Corrosion of 304 Stainless Steel under a NaCl Droplet

2011 ◽  
Vol 480-481 ◽  
pp. 443-447
Author(s):  
Yan Hua Wang ◽  
Yuan Yuan Liu
Keyword(s):  
Stainless Steel ◽  
Corrosion Rate ◽  
Corrosion Potential ◽  
Corrosion Process ◽  
Localized Corrosion ◽  
304 Stainless Steel ◽  
Galvanic Current ◽  
Cooperative Effects ◽  
Electrochemical Parameters ◽  
Wire Beam Electrode

The distributions of corrosion potential and galvanic current of 304 stainless steel under a NaCl droplet were studied by using the wire beam electrode (WBE). It was found that the distributions of the electrochemical parameters were heterogeneous with isolated anodic and cathodic zones appeared randomly. During the corrosion process, the polarity of some anodes changed with the evolution of time. The localized corrosion rate and heterogeneity increased firstly, and then decreased afterward with the increase of time, which can be attributed to the cooperative effects of the aggressive ions and the corrosion products.

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