臺灣地區鋅金屬大氣腐蝕速率預測模式之建立

A Regression Model for Predicting the Corrosion Rate of Zinc in Taiwan

本研究利用臺灣地區腐蝕劣化因子研究調查之數據，以迴歸分析建立適用於鋅金屬腐蝕速率解釋與預測的模式，並依據統計推論應遵循之程序，完成迴歸模式顯著性及基本假設之檢定，以確立分析結果為具意義之模式。研究結果顯示：氯鹽沉積、二氧化硫沉積與溼潤時間等3項環境因子對臺灣地區鋅金屬的腐蝕速率，以氯鹽的影響最為顯著。經由數個分析模式的檢定結果，得到一適用於C5M腐蝕性等級的鋅金屬腐蝕速率預測之簡單迴歸模式，Rcorr = 4.108 + 0.541×Cl。

This study aimed at developing a regression model for predicting the corrosion rate of zinc based upon the data from earlier studies on corrosion factors of atmosphere in Taiwan. Furthermore, in order to establish a meaningful model, we completed significance tests and validated the basic assumptions of the regression analysis based on statistical principles. The results showed that chloride is the most significant factor to influence the corrosion rate of zinc in Taiwan among the factors of chloride deposition, sulfur dioxide deposition, and time of wetness. According to the analysis results from a number of models, a simple regression model was developed for predicting the corrosion rate of zinc exposed to highly corrosive atmospheres.