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7. Corrosion resistance of boilers
The choice of a construction material for a device must take into account not only operating conditions, but also the effect of processing operations (forming, welding, surface finishing).
Preferential weld corrosion" is a phenomenon regularly reported by users, which can have complex origins.
The following information is intended to make users aware of the influence of certain metallurgical phenomena related to processing on service life.
7.1 Hardening effect
Cold forming of tubes, ferrules or heads leads to work-hardening of stainless steels, as well as the development of residual tensile stresses. For the most sensitive grades, these two effects can lead to increased susceptibility to stress corrosion....
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Corrosion resistance of boilers
Washing and testing water
Bibliography
Basic works
Reference
In Engineering Techniques
On stainless steels
On forming
About welding
Basic works
Standardization
Series of AWS standards (published by AWS).
ASTM series of standards (distributed by ASTM International).
Series of NF EN standards (distributed by AFNOR).
- Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count - ASTM E 562 - 2002
- Standard Practice for Detecting Susceptibility to Intergranular Attack in Austenitic...
Regulations
Directive 97/23/EC of the European Parliament and of the Council of May 29, 1997 on the approximation of the laws of the Member States concerning pressure equipment, known as the Pressure Equipment Directive (PED), OJ L181 of July 9, 1997.
Organizations
UNS numbers (unified numbering system for metals and alloys)
http://www.matweb.com/search/SearchUNS.asp
Center technique des industries mécaniques (Cetim)
Syndicat national de la chaudronnerie,...
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