Coating technologies have improved the working life for nuclear steam generators, chemical and petrol chemical implants which work at high pressure and high temperatures in gaseous hydrogen environments. In fact the possibility of coating the structural carbon steal with austenitic stainless steel increases corrosion resistance and hydrogen attack resistance of structures, even if it does not resolve the whole problem. In this work welding overlay technology has been studied. Furthermore the welding overlay is fundamental in explosion cladding technology for the weld overlay restoring of joining areas uncovered during the welding process of the structural materials. Today this solution is largely used to build vessels, reactors, pipes, boiler tubes and heat exchangers. Cladding with austenitic stainless steel for corrosion resistance is used extensively in hydro-desulphurization reactors and other pressure vessels. For these particular applications, austenitic stainless steels or nickel-based alloys are clad onto a carbon or Cr-Mo steel substrate to inhibit corrosion and high-temperature oxidation, save material costs and prolong the life of the component. However, in some instances, these weld claddings have failed catastrophically near the weld fusion boundary. These failures cost the industry millions of dollars each year in repair or replacement. These failures, named “disbonding damage”, have produced cracking that has been observed in several locations near the fusion boundary region. This phenomenon is usually investigated by ultrasonic testing and metallurgical analysis. In order to study this phenomenon, the authors have utilized premature fracture methodology to correlate the damage caused by hydrogen with the charge rate and the partial pressure of the hydrogen inside. In particular it is possible to give an anticipatory analysis of hydrogen damage progress.
Hydrogen-steel Interaction: a new method of hidrogen dammage analysis for AISI316 welding overlay coating emploied in high-pressure and high.temperature implants / Borruto, Adelina Teresa Maria; Palma, F.. - ELETTRONICO. - (2004), p. Strategies for Environment Compatible production,trasportation,trasmission and distribution of Ener. (Intervento presentato al convegno 5TH InternationalCongress Energy, Environment and technological innovation tenutosi a Rio de Janeiro, Brazil nel 4 - 7 October 2004).
Hydrogen-steel Interaction: a new method of hidrogen dammage analysis for AISI316 welding overlay coating emploied in high-pressure and high.temperature implants
BORRUTO, Adelina Teresa Maria;
2004
Abstract
Coating technologies have improved the working life for nuclear steam generators, chemical and petrol chemical implants which work at high pressure and high temperatures in gaseous hydrogen environments. In fact the possibility of coating the structural carbon steal with austenitic stainless steel increases corrosion resistance and hydrogen attack resistance of structures, even if it does not resolve the whole problem. In this work welding overlay technology has been studied. Furthermore the welding overlay is fundamental in explosion cladding technology for the weld overlay restoring of joining areas uncovered during the welding process of the structural materials. Today this solution is largely used to build vessels, reactors, pipes, boiler tubes and heat exchangers. Cladding with austenitic stainless steel for corrosion resistance is used extensively in hydro-desulphurization reactors and other pressure vessels. For these particular applications, austenitic stainless steels or nickel-based alloys are clad onto a carbon or Cr-Mo steel substrate to inhibit corrosion and high-temperature oxidation, save material costs and prolong the life of the component. However, in some instances, these weld claddings have failed catastrophically near the weld fusion boundary. These failures cost the industry millions of dollars each year in repair or replacement. These failures, named “disbonding damage”, have produced cracking that has been observed in several locations near the fusion boundary region. This phenomenon is usually investigated by ultrasonic testing and metallurgical analysis. In order to study this phenomenon, the authors have utilized premature fracture methodology to correlate the damage caused by hydrogen with the charge rate and the partial pressure of the hydrogen inside. In particular it is possible to give an anticipatory analysis of hydrogen damage progress.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
