Paper Title:
Thermal Decomposition Kinetic and Electrochemical Properties of KZn2(PO4)(HPO4)
  Abstract

Thermal decomposition kinetic reaction parameters of KZn2(PO4)(HPO4) was investigated by non-isothermal measurement used in a multivariate non-linear regression analysis. The anticorrosive performance of the phosphate extracts in different pH 3.5% NaCl was studied by polarization and open circuit potential measurements. Kinetics analysis shows that the decomposition of KZn2(PO4)(HPO4) acts as a double-step reaction of : a n order autocatalytic reaction (Cn) with n =1.0791, E1 = 365.06 kJ/ mol, A1 =8.69×1022s−1 is followed by a expended Prout-Tompkins reaction (Bna) with n=2.6548, E2 = 390.91 kJ /mol, A2 = 5.37×1024 s−1. In different pH 3.5% NaCl extracts, KZn2(PO4)(HPO4) functions as a cathodic inhibitor on steel and is even superior to other phosphates in efficiency. The inhibiting efficiency of the pigments on steel decrease in the order: KZn2(PO4)(HPO4) > aluminum zinc phosphate > zinc phosphate ≧ aluminum triphosphate

  Info
Periodical
Advanced Materials Research (Volumes 152-153)
Edited by
Zhengyi Jiang, Jingtao Han and Xianghua Liu
Pages
184-191
DOI
10.4028/www.scientific.net/AMR.152-153.184
Citation
D. L. Chen, S. M. Ma, H. C. Yu, A. Q. Yuan, A. P. Liao, J. Wu, "Thermal Decomposition Kinetic and Electrochemical Properties of KZn2(PO4)(HPO4)", Advanced Materials Research, Vols. 152-153, pp. 184-191, 2011
Online since
October 2010
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