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作者簡介 :孫志華 (1969 -)　女 ,碩士 ,高級工程師。主要研究方向 :飛機材料及涂層腐蝕性能評價和防護工藝。
Tel : 010262496445 E2mail: zhihuasun2002@yahoo.com.cn (責任編輯 :蔡斐 )

　　文章編號 :100026893 (2008) 0320634206

環境嚴酷性指數腐蝕當量方法及其應用研究

曹定國 ,任三元 ,王浩偉 (中國特種飛行器研究所 ,湖北荊門　480035)
Equivalent Method of Using ESI for Corrosion Damage and Its Application
Cao Dingguo , Ren Sanyuan , Wang Haowei
(China Special Flight Vehicle Research Institute , Jingmen　480035 , China)

environment severity index ( ESI) for corrosion damage and study its application in durability design for aircraft structures. On the basis of the relationship between material/ structure corrosion and a singularity environment type/ element/ intensity , according to ASTM G102289 (Standard practice for calculation of corrosion rates and related information from electrochemical measurements) , the ESI is induced and presented. Moreover , the ESI of a synthetical environ2 ment (comprised by several different environments) under certain engineering assumptions is also provided. According to the principle of equivalence of corrosion damage , the synthetical environment and its duration time (or environment spectrum) can be presented by a normal environment and its corresponding duration time. This method can be applied to provide basis for environment equivalence in accelerated corrosion tests and generate an environment equivalent spectrum to evaluate the inspection period/ calendar life of a structure in aircraft durability design. According to correlation test results , the ESI and the environment equivalent fac2 tor (EEF) in different environments for a typical metal and several cases for converting environment spectrum are calculated. Key words : corrosion prevention and control ; environment severity index ; equivalent ; aircraft structure ; dura2 bility design
摘　要 :建立統一的腐蝕損傷環境變量 ———環境嚴酷性指數 ( ESI) ,并研究其在飛機結構耐久性設計中的應用。在材料/結構腐蝕與單一環境類型/要素/強度關系基礎上 ,按照《由電化學測量值計算腐蝕率和相關量的標準方法》(ASTM G102289) ,引入并給出相應的 ESI ,并在一定工程假設下 ,給出在綜合環境 (由不同環境類型
/要素/強度組成)作用下的 ESI。同時 ,在腐蝕損傷等效原則下 ,用標準的環境類型
/要素/強度及其作用時間當量化地表征綜合環境及相應的作用時間 (即環境譜),為環境加速試驗環境當量提供依據并形成環境當量譜以應用于飛機結構耐久性設計中的腐蝕防護與控制 ( EEF) ,評估結構的檢查周期/日歷壽命。根據相關試驗結果計算了典型金屬材料在不同環境中的環境嚴酷性指數及環境當量化系數 ( EEF) ,給出了環境簡化或折算的算例。
　
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