2009 ~ 2019年臺灣大氣腐蝕因子調查趨勢分析比較探討

Study of corrosive factors of atmosphere and trend analysis and comparison in Taiwan

臺灣為高溫、高濕、高鹽份的海島環境，造成公共工程結構物腐蝕嚴重。因此，瞭解臺灣地區大氣腐蝕劣化因子，尤其重要。今將2009.01 ~ 2019.12試驗期間，依年度及各垂直試驗線、特定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，繪圖分析趨勢，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、基隆、台塑六輕、花蓮港等試驗線較高，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，碳鋼腐蝕速率以桃園試驗線、基隆試驗線、台塑六輕試驗線較高，鋅腐蝕速率以桃園試驗線較高，銅腐蝕速率以台塑六輕試驗線較高，鋁腐蝕速率以桃園、台塑六輕等試驗線較高。

Taiwan is an island and locates at tropic and sub-tropic climates with high humidity and salinity. Metal components are prone to corrosion. Therefore, it is particularly important to understand the deterioration and atmospheric corrosion factors in Taiwan. The deterioration factors and the data of metal corrosion, including chloride deposition rate and sulfur dioxide deposition amount in each year, ten-year trends, each vertical test line and specific test sites are analyzed during the test period from January 2009 to December 2019. In this regard, it is necessary to enable the basis of corrosion protection design and maintenance management of structures in the future.
The results show that the chloride salt deposition rate in the Taoyuan test lead, the Keelung test lead, and the Formosa Plastics Naphtha Cracker #6 test lead and the Hualien Port test lead were higher. The sulfur dioxide deposition rate in Kuan-yin Industrial Park, Longde Industrial Park, Linhai Industrial Park, and Changbin Industrial Park were higher. For the one-year test piece, the vertical test lead, the corrosion rate of carbon steel in the Taoyuan test lead, the Keelung test lead, and the Formosa Plastics Naphtha Cracker #6 test lead were higher. The corrosion rate of zinc in the Taoyuan test lead was higher. The copper corrosion rate in the Formosa Plastics Naphtha Cracker #6 test lead was higher. The corrosion rate of aluminum in the Taoyuan test lead and the Formosa Plastics Naphtha were higher.