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Zinc Silicate Based Pigments for Corrosion Inhibition of Cold Rolled Steel

Pemmaraju, Prajyula
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1552657123301627

Abstract Details

2018, MS, University of Cincinnati, Engineering and Applied Science: Materials Science.
In solution form, zinc silicate and phosphates are widely used as corrosion inhibitors for prevention of corrosion, especially in cooling water systems and pipelines. Zinc silicate in powder/pigment form (derived from reaction of ethyl silicate and zinc tailings) has also been extensively used in organic based primer coatings, for long-term corrosion protection of large steel structures harsh environments. However, not much wok has been done on characterizing these pigments on the basis of their structure and composition, which specially relate to their corrosion inhibiting action. This research investigates, therefore, the corrosion inhibition behavior of a novel Zinc silicate corrosion inhibitor, prepared using different synthesis techniques, focusing on the characteristics of the pigment along with studying the corrosion mechanism on a cold rolled steel substrates. The aim was to develop a non-toxic, environment friendly, and low cost alternative zinc silicate processed pigment. The unique feature of this work is the development of the zinc (meta) silicate pigments using a combination of Zinc sulfate and Sodium silicate powders with solution based co-precipitation technique. By controlling the stoichiometry temperature, time, and stirring regime, followed by controlled drying and heat treatment, the particle size and structural characteristics of the powders, were thereby determined, with respect corrosion inhibition efficiency, as determined from electrochemical analysis and immersion testing. Further the structural study of these pigments has been carried out by various characterization techniques such as XRD, FTIR, SEM and EDAX to analyze the crystallite size, structural bond vibrations and morphological changes which brings out the inhibition effect. Optical measurements of the immersed samples show the corrosion inhibition of these pigments. This study explains the structural dependence of the inhibitors on the electrochemical behavior of the zinc silicate powders produced and also gives an optimum way of producing zinc silicate powders which were proved to be the best suited phase for anti-corrosive behavior.
Donglu Shi, Ph.D. (Committee Chair)
Rodney Roseman, Ph.D. (Committee Member)
Zhangzhang Yin, Ph.D. (Committee Member)
82 p.
Materials Science
Zinc silicate; Corrosion; Corrosion inhibitors; Cold rolled steel; Sodium silicate; zinc sulphate

Recommended Citations

Citations

  • Pemmaraju, P. (2018). Zinc Silicate Based Pigments for Corrosion Inhibition of Cold Rolled Steel [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1552657123301627

    APA Style (7th edition)

  • Pemmaraju, Prajyula. Zinc Silicate Based Pigments for Corrosion Inhibition of Cold Rolled Steel. 2018. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1552657123301627.

    MLA Style (8th edition)

  • Pemmaraju, Prajyula. "Zinc Silicate Based Pigments for Corrosion Inhibition of Cold Rolled Steel." Master's thesis, University of Cincinnati, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1552657123301627

    Chicago Manual of Style (17th edition)

ucin1552657123301627
810
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This open access ETD is published by University of Cincinnati and OhioLINK.