scholarly journals Investigation of Error Reduction Methods for Electrochemical Corrosion Potential Measurement in High Temperature-High Purity Water

2017 ◽  
Vol 66 (9) ◽  
pp. 289-298 ◽  
Author(s):  
Masahiko Tachibana
Keyword(s):  
High Temperature ◽  
High Purity ◽  
Corrosion Potential ◽  
Electrochemical Corrosion ◽  
Error Reduction ◽  
Potential Measurement ◽  
Reduction Methods

Protective Insulated Coating for IGSCC Mitigation in BWRs

2004 ◽  
Author(s):  
Young-Jin Kim
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Water Chemistry ◽  
Corrosion Potential ◽  
Electrochemical Corrosion ◽  
304 Stainless Steel ◽  
High Temperature Water ◽  
Coating Methods ◽  
Temperature Water

A protective insulated coating (PIC) on 304 stainless steel (SS) surfaces as an IGSCC mitigation method was developed and investigated in high temperature water under various water chemistry conditions by measuring the electrochemical corrosion potential (ECP) and flow-assisted corrosion (FAC) rate. The ECP results clearly demonstrate that the PIC layer restricted oxidant transport to the metal surface, and the ECP remained at <−230 mV (SHE) in 288°C containing high oxygen (O2) and no hydrogen (H2). In this paper, long term durability of PIC layer prepared by various coating methods will be discussed.

ORVAR SUPERIOR

Alloy Digest ◽  
2007 ◽  
Vol 56 (8) ◽  
Keyword(s):  
Fine Structure ◽  
High Temperature ◽  
North America ◽  
Thermal Fatigue ◽  
High Purity ◽  
Heat Treating ◽  
Good Resistance ◽  
Die Steel ◽  
Temperature Performance ◽  
Hot Work Die

Abstract Orvar Superior is a premium Cr-Mo-V alloyed hot-work die steel with good resistance to thermal fatigue. The name “superior” is used to indicate that close control in special melting and refining has attained a high purity and very fine structure that produces isotropic properties. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: TS-653. Producer or source: Böhler-Uddeholm North America.

The Role of Cr in H Desorption Kinetics in Rapidly Solidified Al

2014 ◽  
Vol 783-786 ◽  
pp. 264-269 ◽  
Author(s):  
Iya I. Tashlykova-Bushkevich ◽  
Keitaro Horikawa ◽  
Goroh Itoh
Keyword(s):  
High Temperature ◽  
Thermal Desorption ◽  
High Purity ◽  
Thermal Desorption Spectroscopy ◽  
Secondary Phase ◽  
Hydrogen Desorption ◽  
Oxide Surface ◽  
Desorption Kinetics ◽  
Hydrogen Trapping ◽  
Rapidly Solidified

Hydrogen desorption kinetics for rapidly solidified high purity Al and Al-Cr alloy foils containing 1.0, 1.5 and 3.0 at % Cr were investigated by means of thermal desorption analysis (TDA) at a heating rate of 3.3°C/min. For the first time, it was found that oxide inclusions of Al2O3 are dominant high-temperature hydrogen traps compared with pores and secondary phase precipitates resulted in rapid solidification of Al and its alloys. The correspondent high-temperature evolution rate peak was identified to be positioned at 600°C for high purity Al and shifted to 630°C for Al-Cr alloys. Amount of hydrogen trapped by dislocations increases in the alloys depending on Cr content. Microstructural hydrogen trapping behaviour in low-and intermediate temperature regions observed here was in coincidence with previous data obtained for RS materials using thermal desorption spectroscopy (TDS). The present results on hydrogen thermal desorption evolution indicate that the effect of oxide surface layers becomes remarkable in TDA measurements and show advantages in combinations of both desorption analysis methods to investigate hydrogen desorption kinetics in materials.

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