Passivation of stainless steel by δ-Al2O3 films resistant to ozonized water

M. Yoshida; A. Seki; Y. Shirai; T. Ohmi

doi:10.1116/1.581683

Passivation of stainless steel by δ-Al₂O₃ films resistant to ozonized water

M. Yoshida, A. Seki, Y. Shirai, T. Ohmi

New Industry Creation Hatchery Center (NICHe)

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Alumina films have been successfully formed on austenitic stainless steels containing 4 and 5 wt % Al by selective oxidation of Al in a H₂O/H₂ environment. γ-alumina films have been formed by oxidation at 800°C and δ-alumina films at 900°C. Satisfactory corrosion resistance performance for ozone gas has been obtained for both γ- and δ-alumina films. For ozonized water, δ-alumina films formed with pH₂O/pH₂≤1 × 10^-4 have good corrosion resistance while δ-alumina films formed with pH₂O/pH₂≥3 × 10^-4 or γ-alumina films do not. Holes of a characteristic triangular shape are observed on the oxidized surface of stainless steels containing 4 wt % Al, probably caused by the habitual formation of precipitated β-(Fe,Ni)Al. No such hole has been observed on the oxidized surface of stainless steels containing 5 wt % Al.

Original language	English
Pages (from-to)	1059-1065
Number of pages	7
Journal	Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume	17
Issue number	3
DOIs	https://doi.org/10.1116/1.581683
Publication status	Published - 1999

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films

Access to Document

10.1116/1.581683

Cite this

@article{8b6a1552191b43cc9c5a4011ed70ade0,

title = "Passivation of stainless steel by δ-Al2O3 films resistant to ozonized water",

abstract = "Alumina films have been successfully formed on austenitic stainless steels containing 4 and 5 wt % Al by selective oxidation of Al in a H2O/H2 environment. γ-alumina films have been formed by oxidation at 800°C and δ-alumina films at 900°C. Satisfactory corrosion resistance performance for ozone gas has been obtained for both γ- and δ-alumina films. For ozonized water, δ-alumina films formed with pH2O/pH2≤1 × 10-4 have good corrosion resistance while δ-alumina films formed with pH2O/pH2≥3 × 10-4 or γ-alumina films do not. Holes of a characteristic triangular shape are observed on the oxidized surface of stainless steels containing 4 wt % Al, probably caused by the habitual formation of precipitated β-(Fe,Ni)Al. No such hole has been observed on the oxidized surface of stainless steels containing 5 wt % Al.",

author = "M. Yoshida and A. Seki and Y. Shirai and T. Ohmi",

year = "1999",

doi = "10.1116/1.581683",

language = "English",

volume = "17",

pages = "1059--1065",

journal = "Journal of Vacuum Science and Technology A",

issn = "0734-2101",

publisher = "AVS Science and Technology Society",

number = "3",

}

TY - JOUR

T1 - Passivation of stainless steel by δ-Al2O3 films resistant to ozonized water

AU - Yoshida, M.

AU - Seki, A.

AU - Shirai, Y.

AU - Ohmi, T.

PY - 1999

Y1 - 1999

N2 - Alumina films have been successfully formed on austenitic stainless steels containing 4 and 5 wt % Al by selective oxidation of Al in a H2O/H2 environment. γ-alumina films have been formed by oxidation at 800°C and δ-alumina films at 900°C. Satisfactory corrosion resistance performance for ozone gas has been obtained for both γ- and δ-alumina films. For ozonized water, δ-alumina films formed with pH2O/pH2≤1 × 10-4 have good corrosion resistance while δ-alumina films formed with pH2O/pH2≥3 × 10-4 or γ-alumina films do not. Holes of a characteristic triangular shape are observed on the oxidized surface of stainless steels containing 4 wt % Al, probably caused by the habitual formation of precipitated β-(Fe,Ni)Al. No such hole has been observed on the oxidized surface of stainless steels containing 5 wt % Al.

AB - Alumina films have been successfully formed on austenitic stainless steels containing 4 and 5 wt % Al by selective oxidation of Al in a H2O/H2 environment. γ-alumina films have been formed by oxidation at 800°C and δ-alumina films at 900°C. Satisfactory corrosion resistance performance for ozone gas has been obtained for both γ- and δ-alumina films. For ozonized water, δ-alumina films formed with pH2O/pH2≤1 × 10-4 have good corrosion resistance while δ-alumina films formed with pH2O/pH2≥3 × 10-4 or γ-alumina films do not. Holes of a characteristic triangular shape are observed on the oxidized surface of stainless steels containing 4 wt % Al, probably caused by the habitual formation of precipitated β-(Fe,Ni)Al. No such hole has been observed on the oxidized surface of stainless steels containing 5 wt % Al.

UR - http://www.scopus.com/inward/record.url?scp=3943067764&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=3943067764&partnerID=8YFLogxK

U2 - 10.1116/1.581683

DO - 10.1116/1.581683

M3 - Article

AN - SCOPUS:3943067764

VL - 17

SP - 1059

EP - 1065

JO - Journal of Vacuum Science and Technology A

JF - Journal of Vacuum Science and Technology A

SN - 0734-2101

IS - 3

ER -

Passivation of stainless steel by δ-Al₂O₃ films resistant to ozonized water

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this