塗裝系統在澎湖地區的大氣曝露試驗

Exposure Test of Coating Systems in the Atmosphere at Peng-Hu Area

台灣地處亞熱帶，高溫潮濕，尤其以澎湖外島及本島沿海地區之腐蝕問題最為嚴重。為了提高特殊腐蝕環境下外露結構與設備之防蝕性能，本文針對目前常見的鋼（鐵）材塗裝系統，包括三聚磷酸鋁、無機鋅粉漆、金屬熔射、塑膠熔射、複合熔射及現場維護等塗裝系統進行鹽霧及大氣曝露試驗，希望藉由實地腐蝕試驗，累積更多腐蝕數據及經驗。經鹽霧4500小時與二年五個月的大氣曝露結果，證實金屬熔射系統及無機鋅粉塗裝系統均具有優異的防蝕性能，適合於嚴苛腐蝕環境下之外露鋼構裝備使用。

Taiwan is located in the subtropical zone with high temperature and humidity all the year, especially, in Peng-Hu area and coastal region around the island. In this study, in order to promote the anti-corrosion performance of outdoor steel structure, some coating systems in common use were evaluated including aluminum tripolyphosphate painting system, inorganic zinc dust painting system, metal sprayed coating system, plastic sprayed coating system, complex thermal sprayed coating system and field maintain system. The accelerative salt fog test and atmosphere exposure were performed to verify anti-corrosion capability of coating systems and collected related corrosion information. The experimental results of 4500 hours salt fog test and 29 months atmosphere exposure indicated that both metal sprayed coating system and inorganic zinc dust painting system have been proved their excellent anti-corrosion performance and are quite suitable for outdoor equipments served in the severe corrosion environment.