Identifying Factors Influencing the Corrosion Rate of Steel Using Nonparametric Statistics

D. Nieves-Mendoza; C. Gaona-Tiburcio; H. L. Hervert Z; Mendez R. C.; P. Castro-Borges; A. Borunda T; P. Zambrano Robledo; F. Almeraya-Calderón

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Identifying Factors Influencing the Corrosion Rate of Steel Using Nonparametric Statistics

机译：使用非参数统计量确定影响钢腐蚀速率的因素

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Statistical techniques have made it possible to describe the behavior of certain phenomena.Nonetheless, given the difficulty in obtaining adequate data, it is common not to have random andhomogeneous samples in order to conduct parametric statistical tests (which follow a knowndistribution). The present study reports results from the use of a non-parametric statistical test (whichdoes not follow a known distribution) known as the Mood test of median differences which wasconducted to analyze the corrosion rate of concrete beams exposed to different environmentalconditions. The main objective was to statistically determine which factors accelerated the corrosionrate of the beams under study. Results showed that the tested factors (three different concrete covers:15, 20 and 30 mm, and two water/cement ratios: 0.45 and 0.65), had statistically significant effects onthe corrosion rate. Greater corrosion rates were observed for beams with covers of 15 and 20 mm, andwith a water/cement ratio of 0.65. Nonetheless, we found that the corrosion rate was not statisticallydifferent between sides of the beam facing prevailing winds, and those that were sheltered from them.

机译：统计技术使描述某些现象的行为成为可能。尽管如此，由于难以获得足够的数据，通常没有随机且同质的样本才能进行参数统计检验（遵循已知分布）。本研究报告了使用非参数统计检验（不遵循已知分布）的结果，该检验称为中位数差异Mood检验，用于分析暴露在不同环境条件下的混凝土梁的腐蚀速率。主要目的是统计确定哪些因素加速了所研究梁的腐蚀速率。结果表明，测试因素（三种不同的混凝土覆盖层：15、20和30 mm，以及两种水灰比：0.45和0.65）对腐蚀速率具有统计学意义。观察到覆盖层为15和20 mm，水灰比为0.65的梁的腐蚀速率更高。尽管如此，我们发现，在面对盛行风的梁的侧面与被风遮挡的梁的侧面之间，腐蚀速率在统计学上没有区别。

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《International Journal of Electrochemical Science》 |2012年第7期|共10页
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D. Nieves-Mendoza; C. Gaona-Tiburcio; H. L. Hervert Z; Mendez R. C.; P. Castro-Borges; A. Borunda T; P. Zambrano Robledo; F. Almeraya-Calderón;
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Identifying Factors Influencing the Corrosion Rate of Steel Using Nonparametric Statistics

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