Kinetic Analysis of High‐Temperature Oxidation of Metals Accompanied by Scale Volatilization
Kinetic Analysis of High‐Temperature Oxidation of Metals Accompanied by Scale Volatilization
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伴随水垢挥发的金属高温氧化动力学分析
DOI：
10.1149/1.1392534
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发表时间：
1999
影响因子：
3.9
通讯作者：
H. Taimatsu
中科院分区：
文献类型：
--
作者：
H. Taimatsu
An equation suitable for analyzing the high-temperature oxidation kinetics of metals in the case where scale volatilization is inevitable is presented. The equation derived {Delta}m = k'{sub p}{sup 1/2}t{sup 1/2} - (2/3 + f{sub Me}/3) k{prime}{sub v}t, where k{prime}{sub p} is the parabolic rate constant, f{sub Me} the mass fraction of the metal Me in the scale oxide Me{sub {nu}}O, and k'{sub v} the volatilization rate constant of the oxide, has such a simple form as to be used for easily separating the mass gain into the scale growth due to diffusion and its volatilization by curve-fitting the equation for mass gain data. The limitations of the application of this equation are discussed, and its validity is verified by its application to experimental data reported for Cr{sub 2}O{sub 3}-forming alloys.
An equation suitable for analyzing the high-temperature oxidation kinetics of metals in the case where scale volatilization is inevitable is presented. The equation derived {Delta}m = k'{sub p}{sup 1/2}t{sup 1/2} - (2/3 + f{sub Me}/3) k{prime}{sub v}t, where k{prime}{sub p} is the parabolic rate constant, f{sub Me} the mass fraction of the metal Me in the scale oxide Me{sub {nu}}O, and k'{sub v} the volatilization rate constant of the oxide, has such a simple form as to be used for easily separating the mass gain into the scale growth due to diffusion and its volatilization by curve-fitting the equation for mass gain data. The limitations of the application of this equation are discussed, and its validity is verified by its application to experimental data reported for Cr{sub 2}O{sub 3}-forming alloys.