Behaviour of Ni-based coating alloys in supercritical water

Qian, Yunfen

doi:10.22215/etd/2011-07397

Cited by 1 publication

(2 citation statements)

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“…The increased weight gain for 310Al is consistent with that observed in the study of ODS steel, containing 19 wt-% Cr and Al addition; 9 although reduced weight gain with Al addition was achieved in ODS alloy containing 16 wt-%Cr. 26 Ti addition to 310 alloy resulted in a weight increase, different from what was observed in Ref. 27.…”

Section: Discussioncontrasting

confidence: 71%

“…Al addition in alloys has been shown to assist dense and stable oxide formation on the surface, which in turn, offers better protection to alloys exposed to SCW. 25,26 Al addition was used in oxide dispersion strengthened (ODS) ferritic/martensitic alloys in an attempt to reduce the Cr content while maintaining the corrosion resistance since high Cr content in ODS steels has been observed to cause aging embrittlement due to the formation of Cr-containing secondary phase. 9 However, the effect of Al addition on corrosion resistance was found to be more prominent when Cr content was less than 19 wt-%.…”

Section: Discussionmentioning

confidence: 99%

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Effect of Al and Ti addition on performance of stainless steel 310 in supercritical water

Mohammadi

Huang

2014

Corrosion Engineering, Science and Technology

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In this study, standard stainless steel 310, modified 310 with Al and Ti and aluminised 310 were tested in supercritical water (SCW) at 500uC for 1555 h. Weight change measurement and microstructure analysis were carried out to evaluate the corrosion behaviour of these alloys and surface oxide formation in SCW. After 1555 h of SCW exposure, all modified and aluminised samples showed higher weight gain than 310, although weight loss commenced after 887 h for the aluminised samples. Al addition contributed to more surface spinel formation while Ti reduced spinel on the surface and helped form more uniform and dense surface oxide structure. In addition to higher weight gain and subsequent weight loss, aluminised samples also suffered from surface cracking, suggesting that high Al and low Cr surface content is not beneficial for SCW application.

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Section: Discussioncontrasting

confidence: 71%