Effect of Extension Rate on Stress Corrosion Cracking Velocity Using Electrochemical Noise Analysis

2019 ◽  
Vol 3 (24) ◽  
pp. 13-18
Author(s):  
Claudia Lopez ◽  
Citalli Gaona ◽  
Adan Borunda ◽  
Facundo Almeraya ◽  
Alberto Martinez ◽  
...  
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Electrochemical Noise ◽  
Noise Analysis ◽  
Corrosion Cracking ◽  
Extension Rate

scholarly journals Effect of Film-Forming Amines on the Acidic Stress-Corrosion Cracking Resistance of Steam Turbine Steel

Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1628
Author(s):  
Tim De Seranno ◽  
Ellen Lambrechts ◽  
Evelyn De Meyer ◽  
Wolfgang Hater ◽  
Nathalie De Geyter ◽  
...  
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Hydrogen Uptake ◽  
Corrosion Cracking ◽  
Aqueous Environment ◽  
Extension Rate ◽  
Coated Steel ◽  
Acidic Stress ◽  
Film Forming ◽  
Turbine Steel

This work evaluates the effect of film-forming amines (FFA) on the acidic stress-corrosion cracking (SCC) resistance of NiCrMoV turbine steel. Contact angle measurements show an increased hydrophobicity of the surface when coating the steel with oleyl propylene diamine (OLDA). According to potentiodynamic measurements and post-mortem scanning electron microscopy (SEM) analysis, anodic dissolution and hydrogen embrittlement still occur when the steel is FFA coated. In situ constant extension rate testing (CERT) in acidic aqueous environment at elevated temperature of FFA-coated steel shows a ductility gain compared to non-coated steel, explained by a decrease in both corrosion rate and hydrogen uptake.

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