ANTI-CORROSION AND MORPHOLOGICAL ANALYSIS OF A CONVERSION COATING BASED ON NANOCERAMIC HEXAFLUOROZIRCONIC ACID ON A STEEL SUBSTRATE

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EIVAZ MOHAMMADLOO H.; SARABI A.A.; SABBAGH ALVANI A.A.; SAMEEI H.; SALIMI R.

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Journal: JOURNAL OF COLOR SCIENCE AND TECHNOLOGY Year:2012 | Volume:6 | Issue:1 Page(s): 9-18

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Title

ANTI-CORROSION AND MORPHOLOGICAL ANALYSIS OF A CONVERSION COATING BASED ON NANOCERAMIC HEXAFLUOROZIRCONIC ACID ON A STEEL SUBSTRATE

Author(s)

Keywords

NANOCERAMIC CONVERSION COATINGQ2

HEXAFLUOROZIRCONIC ACIDQ2

DC POLARIZATIONQ2

ATOMIC FORCE MICROSCOPY (AFM)Q2

SCANNING ELECTRON MICROSCOPY (SEM)Q1

Abstract

In this research, a nanoceramic HEXAFLUOROZIRCONIC ACID based conversion coating free of phosphate salts was investigated. The effect of practical parameters such as solution pH, temperature and dipping time on coating morphology and anti-corrosion resistance of coating was evaluated. Anti-corrosion resistance of so-called NANOCERAMIC CONVERSION COATING on cold rolled steel (CRS) substrates in different solution pH, temperatures and immersion’s time, utilizing DC POLARIZATION was studied. The conversion coating which was formed at dipping temperature of 20oC, pH=5 and immersion’s time of 60 seconds had the best anti-corrosion resistance. The morphology of the conversion coating surface formed at different pH was investigated using Atomic Force Microscopy (AFM). Images obtained from the microscope indicate that the conversion coating which formed in pH=5 was more consistent and had finer aggregates in comparison with pH=4.25 coating. Field Emission Scanning Electron Microscopy (FE-SEM) of conversion coating formed in 20 and 40oC indicated that surface of conversion coating with higher temperature had micro cracks and was not uniform, also nodules on the scale of tens of nm (40–60 nm) in size, was observed on the surface.

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APA: Copy

EIVAZ MOHAMMADLOO, H., SARABI, A.A., SABBAGH ALVANI, A.A., SAMEEI, H., & SALIMI, R.. (2012). ANTI-CORROSION AND MORPHOLOGICAL ANALYSIS OF A CONVERSION COATING BASED ON NANOCERAMIC HEXAFLUOROZIRCONIC ACID ON A STEEL SUBSTRATE. JOURNAL OF COLOR SCIENCE AND TECHNOLOGY, 6(1), 9-18. SID. https://sid.ir/paper/137204/en

Vancouver: Copy

EIVAZ MOHAMMADLOO H., SARABI A.A., SABBAGH ALVANI A.A., SAMEEI H., SALIMI R.. ANTI-CORROSION AND MORPHOLOGICAL ANALYSIS OF A CONVERSION COATING BASED ON NANOCERAMIC HEXAFLUOROZIRCONIC ACID ON A STEEL SUBSTRATE. JOURNAL OF COLOR SCIENCE AND TECHNOLOGY[Internet]. 2012;6(1):9-18. Available from: https://sid.ir/paper/137204/en

IEEE: Copy

H. EIVAZ MOHAMMADLOO, A.A. SARABI, A.A. SABBAGH ALVANI, H. SAMEEI, and R. SALIMI, “ANTI-CORROSION AND MORPHOLOGICAL ANALYSIS OF A CONVERSION COATING BASED ON NANOCERAMIC HEXAFLUOROZIRCONIC ACID ON A STEEL SUBSTRATE,” JOURNAL OF COLOR SCIENCE AND TECHNOLOGY, vol. 6, no. 1, pp. 9–18, 2012, [Online]. Available: https://sid.ir/paper/137204/en

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