Third element effect in the surface zone of Fe-Cr-Al alloys

• The third element effect to improve the high temperature corrosion resistance of the low-Al Fe-Cr-Al alloys is suggested to involve a mechanism that boosts the recovering of the Al concentration to the required level in the Al-depleted zone beneath the oxide layer. We propose that the key factor in this mechanism is the coexistent Cr depletion that helps to maintain a sufficient Al content in the depleted zone. Several previous experiments related to our study support that conditions for such a mechanism to be functional prevail in real oxidation processes of Fe-Cr-Al alloys.

Subject headings

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Keyword

stainless-steels

phase-separation

potential model

fecral alloys

ods

alloy

oxidation

approximation

aluminum

1000-degrees-c

segregation

Condensed matter physics

Kondenserade materiens fysik

NATURAL SCIENCES

Publication and Content Type

ref (subject category)

art (subject category)