COMPARISON OF MICRO-HARDNESS, CORROSION RESISTANCE AND HYDROGEN PERMEATION OF NI-NANOTIO2 COMPOSITE COATING AND PURE NI COATING FABRICATED BY ELECTRO-DEPOSITION

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SADEGHI A.; AZARI KHOSROSHAHI R.; SADEGHIAN Z.

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Journal: IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING Year:2012 | Volume:- | Issue:12 Page(s): 25-35

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Title

COMPARISON OF MICRO-HARDNESS, CORROSION RESISTANCE AND HYDROGEN PERMEATION OF NI-NANOTIO2 COMPOSITE COATING AND PURE NI COATING FABRICATED BY ELECTRO-DEPOSITION

Author(s)

SADEGHI A. | AZARI KHOSROSHAHI R. | SADEGHIAN Z. | Issue Writer Certificate

Keywords

NANO COMPOSITE COATINGQ2

NI-TIO2Q3

MICROHARDNESSQ2

CORROSIONQ2

HYDROGEN PERMEATION RESISTANCEQ3

Abstract

Ni-nano TiO2 composite coatings on low carbon steel have been prepared in Watts-bath using the electro deposition process. Characteristics of coatings such as micro-hardness, CORROSION and hydrogen permeation were studied and compared with those of pure nickel coating. Micro-hardness results showed a noticeable increase in hardness of composite coatings in respect to the pure nickel coating. It was found that, an increase in TiO2 particle incorporation lead to the micro-hardness increment of the coatings. The CORROSION study of specimens in %5 H2SO4 solution with pH=1 acquired through Tafel polarization, revealed several times reduction in the CORROSION rate (CR) of composite coatings as compared to the pure nickel coating. Furthermore, hydrogen permeation test was performed on both pure nickel and Ni-TiO2 composite coating by the electrochemical approach (Devanthan-Stachursky) to compare their resistivity against hydrogen atoms through hydrogen charging by a power supply and recording permeation density versus time with a Potentiostat. Analysis of the results showed better resistivity of the composite coating against hydrogen permeation compared to the pure nickel coating.

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APA: Copy

SADEGHI, A., AZARI KHOSROSHAHI, R., & SADEGHIAN, Z.. (2012). COMPARISON OF MICRO-HARDNESS, CORROSION RESISTANCE AND HYDROGEN PERMEATION OF NI-NANOTIO₂ COMPOSITE COATING AND PURE NI COATING FABRICATED BY ELECTRO-DEPOSITION. IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING, -(12), 25-35. SID. https://sid.ir/paper/121126/en

Vancouver: Copy

SADEGHI A., AZARI KHOSROSHAHI R., SADEGHIAN Z.. COMPARISON OF MICRO-HARDNESS, CORROSION RESISTANCE AND HYDROGEN PERMEATION OF NI-NANOTIO₂ COMPOSITE COATING AND PURE NI COATING FABRICATED BY ELECTRO-DEPOSITION. IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING[Internet]. 2012;-(12):25-35. Available from: https://sid.ir/paper/121126/en

IEEE: Copy

A. SADEGHI, R. AZARI KHOSROSHAHI, and Z. SADEGHIAN, “COMPARISON OF MICRO-HARDNESS, CORROSION RESISTANCE AND HYDROGEN PERMEATION OF NI-NANOTIO₂ COMPOSITE COATING AND PURE NI COATING FABRICATED BY ELECTRO-DEPOSITION,” IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING, vol. -, no. 12, pp. 25–35, 2012, [Online]. Available: https://sid.ir/paper/121126/en

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