Hydrazine-Dependency of Low-Alloy Steel Flow-Accelerated Corrosion in a Deoxygenated Solution at 250°C

2007 ◽  
pp. 1133-1136
Author(s):  
Ki Woung Sung ◽  
Hyun Il Seo ◽  
Uh Chul Kim ◽  
Wan Young Maeng
Keyword(s):  
Alloy Steel ◽  
Low Alloy Steel ◽  
Accelerated Corrosion ◽  
Steel Flow ◽  
Flow Accelerated Corrosion

scholarly journals The Wear Responses of the Welded Joints of ASTM A335 Gr. P11 Steels Affected by Accelerated Flow Corrosion

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3630
Author(s):  
Montero ◽  
Filgueira ◽  
García-Diez ◽  
Mier ◽  
Camba
Keyword(s):  
Alloy Steel ◽  
Welded Joints ◽  
Wear Behavior ◽  
Post Weld Heat Treatment ◽  
Low Alloy Steel ◽  
Ferritic Alloy ◽  
Accelerated Corrosion ◽  
Welding Procedure ◽  
Accelerated Flow ◽  
Flow Accelerated Corrosion

This study shows the effects of wear on welded joints of ASTM A355 Gr. P11 “Seamless Ferritic Alloy-Steel Pipe for High Temperature Service” steels subjected to the welding procedures established by codes B31.1 and ASME III. The standard welding procedure establishes the following steps: a preheating process, welding and post-weld heat treatment. This generates a wear behavior that depends on the thermal cycles to which the different areas of the joint are subjected. The objective of this article was the study of the behavior against the flow-accelerated corrosion of the welded joints of a low alloy steel. There is the possibility of establishing welding procedures other than those established, while maintaining the safety ranges, depending on the field of application for the steel.

scholarly journals Analysis for the Mechanism of Accelerated Corrosion on Low Alloy Steel in Air-solution Alternating Condition

2019 ◽  
Vol 68 (8) ◽  
pp. 205-211
Author(s):  
Kyohei Otani ◽  
Takashi Tsukada ◽  
Fumiyoshi Ueno
Keyword(s):  
Alloy Steel ◽  
Low Alloy Steel ◽  
Accelerated Corrosion

Hydrazine-Dependency of Low-Alloy Steel Flow-Accelerated Corrosion in a Deoxygenated Solution at 250°C

2007 ◽  
Vol 26-28 ◽  
pp. 1133-1136
Author(s):  
Ki Woung Sung ◽  
Hyun Il Seo ◽  
Uh Chul Kim ◽  
Wan Young Maeng
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Low Alloy Steels ◽  
Accelerated Corrosion ◽  
Test Loop ◽  
Concentration Dependency ◽  
Alloy Steels ◽  
Steel Flow ◽  
Flow Accelerated Corrosion ◽  
Experimental Weight Loss

In the nuclear power plants (NPPs), wall thinning of the piping materials is generally caused by a flow-accelerated corrosion (FAC) and leads to a rupture with no warning unless it is detected and repaired in a timely manner. To reduce the FAC, it is better to use low-alloy steels, such as 1Cr-½Mo and 2¼Cr-1Mo, having higher FAC-resistance than carbon steel. Meanwhile, in the secondary water chemistry at the NPPs in Korea, hydrazine concentration is maintained within the range of 100~150 ppb. For applying these low-alloys to a piping material, we investigated the influence of hydrazine concentration on their FAC. An experiment was carried out at pH25°C of 9 controlled with ammonia in a deoxygenated aqueous solution containing 0~250 ppb-hydrazine by using a FAC test loop at 250°C for 300 hours. Experimental weight loss showed a hydrazine concentration dependency of the FAC in this concentration range, giving minimum at 150 ppb.

Pseudoalteromonas lipolytica accelerated corrosion of low alloy steel by the endogenous electron mediator pyomelanin

2020 ◽  
Vol 162 ◽  
pp. 108215 ◽  
Author(s):  
Tao Liu ◽  
Shuai Pan ◽  
Yanan Wang ◽  
Zhangwei Guo ◽  
Weiquan Wang ◽  
...  
Keyword(s):  
Alloy Steel ◽  
Low Alloy Steel ◽  
Electron Mediator ◽  
Accelerated Corrosion

On Corrosion Resistance Of Austenitic Stainless Steel Clad Layer on a Low Alloy Steel

2018 ◽  
Vol 32 (3) ◽  
pp. 20
Author(s):  
Manas Kumar Saha ◽  
Ritesh Hazra ◽  
Ajit Mondal ◽  
Santanu Das
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Alloy Steel ◽  
Low Alloy Steel ◽  
Clad Layer
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