2010～2014臺灣大氣腐蝕因子之調查與分析

The Survey and Analysis of Atmospheric Corrosive Factors in Taiwan during 2010 to 2014

臺灣四面環海，具有高溫、高濕、高鹽份的環境，公共工程結構物經常受到嚴重的腐蝕。因此，瞭解臺灣地區大氣腐蝕劣化因子，尤其重要。本文將2010 ~ 2014年試驗期間，依一年期及各季試驗點所調查之氯鹽沉積速率、二氧化硫沉積量等劣化因子及金屬腐蝕數據整理呈現，以利日後新建與既有金屬結構物之防蝕設計與維護管理的參考。研究結果顯示，氯鹽沉積速率於垂直海岸試驗線以桃園試驗線最大，二氧化硫沉積速率以觀音、彰濱、臨海及龍德等工業區較高。一年期金屬腐蝕速率部份，於垂直海岸試驗線以桃園、基隆、麥寮及臺中港等試驗線皆高達C5+等級;於特定測站則以台塑六輕、大潭火力電廠、通霄火力電廠、臺中火力電廠及彰濱工業區等站達C5+等級。在季節性之比較中，氯鹽沉積速率、二氧化硫沉積速率及金屬腐蝕速率，均以秋季與冬季較為嚴重。

Taiwan located in a high temperature, high humidity and high salt island environment that resulting in severe corrosion of public structures. Therefore, realizing the situation of atmospheric corrosive factors in Taiwan is very important. In the study, surveyed data were obtained from September 2010 till September 2014. The data were analyzed with chloride deposition rates, sulfur dioxide deposition rates and metals corrosion rates by season and one-year periods. The above information could be applied in metals anti-corrosion design and maintaining management in the future. The study results showed that Tao-yuan test line gets the maximum chloride deposition rate among vertical seashore lines. Guan-yin Industrial Park, Chang-hua Coastal Industrial Park, Da-fa Industrial Park, Lin-hai Industrial Park, Lung-te Industrial Park had higher sulfur dioxide deposition rate than other test sites. Annual metals corrosion rate at vertical seashore lines were indicated that Tao-yuan, Kee-lung, Mai-liau and Tai-chung Harbor test lines had higher corrosion rate and reached C5 + level. At specific test sites such as Formosa Plastics Group's Plants (at Mailiau), Tai-tam Power Plant, Tungh-siao Power Plant, Tai-chung Power Plant and Chang-hua Coastal Industrial Park also had higher corrosion rates and reached C5 + level. In seasonal comparison, chloride deposition rate, sulfur dioxide deposition rate and metals corrosion rate were more impacted within Fall and Winter.