Improvement of corrosion resistance of carbon steel using chemical vapor deposition from the mixture of Mo(CO)6 and Cr(CO)6 with an ArF-excimer laser

Okada, Naoko; Katsumura, Yosuke; Ishigure, Kenkichi

doi:10.1007/bf00331525

Cited by 6 publications

(3 citation statements)

References 23 publications

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“…Results revealed that the vapor deposition (CVD) from the mixture of chromium and chromium content of coating products increased as the molybdenum hexacarbonyl, Cr(CO) 6 and Mo(CO) 6 , respectemperature increased. The dominating surface reactions tively, with an excimer laser has been studied; 14 however, the switched as temperature increased, because of the increase laser generator is quite expensive. Also, a laser-induced chemiof chromium content in the precursor gas.…”

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confidence: 99%

Analysis of (Cr,Mo) Oxycarbide Films Grown on Stainless Steel via Metalloorganic Chemical Vapor Deposition

Wei

1997

Journal of the American Ceramic Society

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A mixture of hexacarbonyl of chromium and molybdenum ((Cr,Mo)(CO)6) was used to deposit oxycarbide films on stainless steel at temperatures of 175°–450°C. Through the analysis of deposition kinetics in various temperature regions, the controlling mechanism was determined to be exothermic surface reactions. Activation energies of the low‐ and medium‐temperature regions were determined to be 71.2 and −60.1 kJ/mol, respectively. Some properties including densities, composition, and crystalline phases of the films were investigated. Results revealed that the chromium content of coating products increased as the temperature increased. The dominating surface reactions switched as temperature increased, because of the increase of chromium content in the precursor gas. Hence, the coating rate and density increased to a maximum, then decreased as the coating temperature was increased to 275°C. Deposited phases were determined by X‐ray diffractometry, and the relationship with film density phases has been discussed, using their microstructural textures from scanning electron microscopy micrographs. Corrosion resistance was measured by an electrochemical method. The films obtained in the low‐ and medium‐temperature regions improved the corrosion resistance of stainless‐steel substrates by a factor of 24. In addition, the latter case showed the effect of passive protection and was an optimized selection for corrosive protection. The relationship of the improvement of corrosion resistance, physical properties, and the contribution of composed phases was discussed.

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confidence: 99%

Analysis of (Cr,Mo) Oxycarbide Films Grown on Stainless Steel via Metalloorganic Chemical Vapor Deposition

Wei

1997

Journal of the American Ceramic Society

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“…The crystal structure was shown to be NaCl-type cubic, the lattice constant was 0.41 nm, and the chemical composition of the chromium oxycarbide was determined as 50 at.% chromium, 25 at.% carbon, and 25 at.% oxygen, using X-ray photoemission spectroscopy (XPS) measurements, which was almost the same material as that reported by Lux and et al Recently, chromium oxycarbides have been prepared by the photolysis of metal hexacarbonyl in the gas phase using ultraviolet lasers. [7][8][9] Unsaturated products, such as Cr(CO) x (x ϭ 0 -5), were formed by one or many photondissociations, using photolysis of Cr(CO) 6 in the gas phase with ultraviolet lasers. 7,8 Chromium oxycarbide also has been prepared by incomplete decomposition of Cr(CO) 6 , using various methods, and the composition of chromium oxycarbide has been shown to be quite variable, depending on the preparation method.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9] Unsaturated products, such as Cr(CO) x (x ϭ 0 -5), were formed by one or many photondissociations, using photolysis of Cr(CO) 6 in the gas phase with ultraviolet lasers. 7,8 Chromium oxycarbide also has been prepared by incomplete decomposition of Cr(CO) 6 , using various methods, and the composition of chromium oxycarbide has been shown to be quite variable, depending on the preparation method. So far as we know, however, chromium oxycarbide has never been prepared using synthesis with metallic chromium and CO 2 or CO.…”

Section: Introductionmentioning

confidence: 99%

Chromium Oxycarbide Thin Films Prepared by Inductively Coupled Radio‐Frequency Plasma‐Assisted Magnetron Sputtering

Kado

Fan

2001

Journal of the American Ceramic Society

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Chromium oxycarbide films were prepared on SUS 304 stainless steel at temperatures of ϳ673 K using the inductively coupled radio-frequency plasma-assisted magnetron-sputtering technique. An inductively coupled 13.56 MHz electromagnetic field with a power of 40 W was supplied to excite the glow discharge, and a direct-current power of 700 W was supplied to sputter a 99.9% chromium target in an Ar/CO 2 /CH 4 mixture and in Ar/CO mixture. Electron probe microanalysis revealed that the film contained chromium, oxygen, and carbon. Vickers microhardness of the film was determined to be >1.96 ؋ 10 10 Pa. X-ray diffractometry measurements revealed that the film structure was cubic, and the lattice constant was a 0 ‫؍‬ 0.42 nm. This structure was almost the same as that of chromium oxycarbide, Cr 2 CO, (rock-salt structure, lattice constant of 0.413 nm). The corrosion resistance of the SUS 304 stainless steel to 1 kmol/m 3 H 2 SO 4 at 293 K was improved by coating it with a Cr(C,O) film to a thickness of 5.92 m.

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Pulsed-laser photolysis of chromium and molybdenum hexacarbonyls at 308 nm: Simultaneous monitoring of optical and acoustic emissions

Chan

Cheung

1995

Appl. Phys. B

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Improvement of corrosion resistance of carbon steel using chemical vapor deposition from the mixture of Mo(CO)6 and Cr(CO)6 with an ArF-excimer laser

Cited by 6 publications

References 23 publications

Analysis of (Cr,Mo) Oxycarbide Films Grown on Stainless Steel via Metalloorganic Chemical Vapor Deposition

Analysis of (Cr,Mo) Oxycarbide Films Grown on Stainless Steel via Metalloorganic Chemical Vapor Deposition

Chromium Oxycarbide Thin Films Prepared by Inductively Coupled Radio‐Frequency Plasma‐Assisted Magnetron Sputtering

Pulsed-laser photolysis of chromium and molybdenum hexacarbonyls at 308 nm: Simultaneous monitoring of optical and acoustic emissions

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