Stress Corrosion Cracking Resistance of Quenched and Tempered High Strength Ni-Cr-Mo Alloy Steel in Phosphate Based Boiler Feed Water

CORROSION ◽  
10.5006/2116 ◽  
2016 ◽  
Author(s):  
Rihan Rihan ◽  
Mehaboob Basha ◽  
Abdulaziz Al-Meshari ◽  
Avtandil Bairamov ◽  
Gys van Zyl ◽  
...  
Keyword(s):  
Stress Corrosion ◽  
Alloy Steel ◽  
Stress Corrosion Cracking ◽  
High Strength ◽  
Corrosion Cracking ◽  
Feed Water ◽  
Cracking Resistance ◽  
Boiler Feed Water

This article has been withdrawn according to CORROSION policy on article withdrawal.

Stress Corrosion Cracking of SA-543 High-Strength Steel in All-Volatile Treatment Boiler Feed Water

2015 ◽  
Vol 24 (10) ◽  
pp. 3773-3782
Author(s):  
R. Rihan ◽  
M. Basha ◽  
A. Al-Meshari ◽  
A. Bayramov ◽  
G. van Zyl ◽  
...  
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
High Strength Steel ◽  
High Strength ◽  
Corrosion Cracking ◽  
Feed Water ◽  
Boiler Feed Water

Fitness for Service Assessments on Cracked Heavy Wall Reactors

2018 ◽  
Author(s):  
Jan Keltjens ◽  
Gys Van Zyl ◽  
Fahad Mudhayeq
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Water Environment ◽  
High Hardness ◽  
High Strength ◽  
Crack Size ◽  
Economic Benefits ◽  
Corrosion Cracking ◽  
Operating Conditions ◽  
Feed Water

A number of large heavy wall reactors showed severe stress corrosion cracking in the high strength low alloy steel shells. The stress corrosion was mainly caused by the fact that no PWHT was performed which resulted in very high hardness of the Heat Affected Zone; this made the HAZ extremely sensitive for stress corrosion cracking in the feed water environment. The extent of the cracking was such that replacement of all reactors was unavoidable. The redesign and fabrication of the new reactors would take over a year. Fitness for Service methodologies were used keep the reactors running safely until the replacements were installed with minimized down time. This resulted in large economic benefits over several years. The paper covers the FFS assessments performed, the special NDT methods required to get the necessary crack size information at operating conditions as well as failure mode and repair options. It demonstrates an application and the benefits of Fitness for Service assessments on key equipment.

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