Use of plasma arc welding process to combat hydrogen metallic disbonding of austenitic stainless steel claddings

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Welding Journal (Miami); (United States)

OSTI ID:5730686

Alexandrov, O A ^[1]; Steklov, O I; Alexeev, A V ^[2]

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1. NACAP Nederland B.V. (Netherlands)
2. State Academy of Oil and Gas, Moscow (Russian Federation)

A separation type crack, metallic disbonding, occurred between austenitic stainless steel weld metal cladding and 2 1/4Cr-1Mo base metal in the hydrodesulfurizing reactor of an oil refining plant. For stainless steel cladding, the submerged arc welding (SAW) process with a strip electrode is usually applied, but the authors experimented with the plasma arc welding (PAW) process with hot wire electrode for the cladding. The metallic disbonding is considered to be attributed to hydrogen accumulation at the transition zone and has been generally studied on a laboratory scale using an autoclave. The authors used a electrolytic hydrogen charging technique for the sake of experimental simplicity and made a comparison with the results for gaseous hydrogen charging. The main conclusions obtained were follows: The PAW stainless steel weld metal cladding is more resistant to metallic disbonding with the PAW process is explained by the desirable microstructure and properties of the first layer of weld metal at the transition zone. Electrolytic hydrogen charging pretty well reproduces the results of autoclave gas phase charging.

• OSTI ID: 5730686
• Journal Information: Welding Journal (Miami); (United States), Journal Name: Welding Journal (Miami); (United States) Vol. 72:11; ISSN 0043-2296; ISSN WEJUA3
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
ARC WELDING
CHEMICAL REACTORS
CHROMIUM-MOLYBDENUM STEELS
COATINGS
CONTAINERS
CRACKS
EMBRITTLEMENT
FABRICATION
FAILURES
HIGH ALLOY STEELS
HYDROGEN EMBRITTLEMENT
INDUSTRIAL PLANTS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
PETROLEUM REFINERIES
PLASMA ARC WELDING
PRESSURE VESSELS
STAINLESS STEELS
STEELS
WELDING