Corrosion mitigation in supercritical water with chromium ion

被引：16

作者：

Daigo, Y. ^{[2
]}

Watanabe, Y. ^{[2
]}

Sue, K. ^{[1
]}

机构：

[1] Nihon Univ, Coll Ind Technol, Dept Appl Mol Chem, Chiba 2758575, Japan

[2] Tohoku Univ, Grad Sch Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

CORROSION | 2007年 / 63卷 / 12期

关键词：

chromium ion; chromium oxide; corrosion mitigation; deposition; oxide scale; solubility of oxide; supercritical water;

D O I：

10.5006/1.3278326

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It was reported that the chromium ion originated from the autoclave material (Ni-44Cr-1Mo) deposited on the specimen surface as chromium oxyhydroxide (CrOOH), and the protective chromium oxide layer mitigated corrosion of the alloys tested in supercritical water containing sulfuric acid (H2SO4). Based on the report, three kinds of tests were conducted at 400 degrees C and 30 MPa in 0.01 mol/kg H2SO4 aqueous solution containing Cr3+ or Cr6+. Corrosion resistance of the specimens became 1.5 similar to 7.5 times better than specimens without chromium ions, because chromium ions from the aqueous solution was incorporated into the protective chromium oxide on the specimen. It was revealed that reduction of Cr6+ to Cr2O3 (Cr3+) occurred on the specimen surface and in the autoclave. The chemical equations of chromium oxide or chromium oxyhydroxicle scale formed on the specimen surface were evaluated.

引用

页码：1085 / 1093

页数：9

共 25 条

[1] Hydrothermal synthesis of metal oxide fine particles at supercritical conditions [J].

Adschiri, T ;

Hakuta, Y ;

Arai, K .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2000, 39 (12) :4901-4907

[2]

ADSCHIRI T, 2000, IND ENG CHEM RES, V39

[3]

ANTAL MJ, 1987, ACS SYM SER, V329, P77

[4]

BOUKIS N, 1998, 417 NACE CORROSION

[5] Effect of chromium ion from autoclave material on corrosion behavior of nickel-based alloys in supercritical water [J].

Daigo, Y. ;

Watanabe, Y. ;

Sue, K. .

CORROSION, 2007, 63 (03) :277-284

[6] Compatibility of nickel-based alloys with Supercritical water applications: Aging effects on corrosion resistance and mechanical properties [J].

Daigo, Y ;

Watanabe, Y ;

Sugahara, K ;

Isobe, T .

CORROSION, 2006, 62 (02) :174-181

[7]

HARA N, 2002, 02358 NACE CORROSION

[8]

IIMURA S, 2001, 01363 NACE CORROSION

[9]

IKUSHIMA Y, 2001, 01364 NACE INT CORRO

[10] SUPCRT92 - A SOFTWARE PACKAGE FOR CALCULATING THE STANDARD MOLAL THERMODYNAMIC PROPERTIES OF MINERALS, GASES, AQUEOUS SPECIES, AND REACTIONS FROM 1-BAR TO 5000-BAR AND 0-DEGREES-C TO 1000-DEGREES-C [J].

JOHNSON, JW ;

OELKERS, EH ;

HELGESON, HC .

COMPUTERS & GEOSCIENCES, 1992, 18 (07) :899-947

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