Abstract
EAC susceptibilities of Alloy 600 and 690 and their weld
metals with and without weld defects such
as hot cracks were studied in pure and doped hydrogenated
steam at 400oC on four-point bend (0.35-
1.1% strain) and U-bend specimens (5% strain). Contrary
to the expectations, no EAC initiation from
existing weld defects was observed. As expected, Alloy
600 and its weld metals Alloys 82 and 182
were much more prone to EAC initiation than Alloy 690 and
its weld metals Alloys 52 and 152. Oxide
structures remain the same in doped and pure steam,
although the doped environment has an impact on
the EAC initiation time and oxidation rate. Because of
the similar oxide structures, the EAC
mechanism is assumed to be the same in the studied
environments. The application of doped steam
testing as accelerating testing method for
environmentally assisted cracking of nickel-based alloys
is
discussed.
| Original language | English |
|---|---|
| Publication status | Published - 2017 |
| MoE publication type | Not Eligible |
| Event | 20th International Corrosion Congress & Process Safety Congress 2017, Eurocorr 2017 - Prague, Czech Republic Duration: 3 Sept 2017 → 7 Sept 2017 http://www.prague-corrosion-2017.com/ |
Conference
| Conference | 20th International Corrosion Congress & Process Safety Congress 2017, Eurocorr 2017 |
|---|---|
| Abbreviated title | Eurocorr 2017 |
| Country/Territory | Czech Republic |
| City | Prague |
| Period | 3/09/17 → 7/09/17 |
| Internet address |
Keywords
- environmentally assisted cracking
- nickel-based alloy
- stress corrosion cracking
- steam
- dissimilar metal weld