臺灣為一海島，地處熱帶/亞熱帶，高溫、高濕與高鹽份的環境，造成金屬在大氣中容易腐蝕劣化。金屬材料的大氣腐蝕機制主要是受大氣中所含水分、氧氣、和腐蝕性物質(如雨水中的雜質、灰塵、金屬表面沉積物等)聯合作用而產生的破壞；因此，欲瞭解臺灣地區大氣腐蝕狀況，大氣腐蝕劣化因子與金屬材料腐蝕之調查與研究，尤其重要。



　　本年報為2023年1月至2023年12月止之大氣腐蝕調查結果，包括：(1)依據中華民國國家標準(CNS)，就金屬及合金之大氣腐蝕性污染測定方法，進行臺灣全島及澎湖、金門與馬祖等地區之大氣腐蝕劣化因子調查，(2)依據CNS製作碳鋼、鋅、銅、鋁標準試樣，並進行現地曝露試驗與腐蝕速率量測，(3)彙整調查試驗結果，進行大氣腐蝕環境分類與建立資料庫網站，提供外界查詢及應用。



　　藉由本所大氣腐蝕環境分類與查詢網站之建立，本年報期能提供相關單位瞭解金屬材料在各腐蝕環境中之耐久性與辦理公共工程防蝕設計、維護之參考應用。

英文內容大要：?? ?



　　Taiwan is an island and locates at tropic and sub-tropic climates with high humidity and salinity. The cost of atmospheric corrosion and corrosion prevention is considerably concerned because of the impact of the corrosive environments. Corrosion of metals is mainly due to reactions of water, oxygen, and corrosive substances such as impurities in the rainfall, dusts, and pollutant precipitations. Hence, study corrosion factors of atmosphere and metals material corrosion rates are very important.



　　In the report, field surveying results were obtained in 2023. The contents were included as follows; (1)applying CNS standard methods for atmospheric corrosive factors investigation on the whole island of Taiwan and Penghu ,Kinmen, Matsu areas ,(2)metal specimens preparation for exposure test and corrosion rate measuring. (3)classifying atmospheric corrosive environments and establishing a database for information inquiring.



　　It is highly anticipated that this report could be offered to relative authorities to realize metals material durable and anti-corrosive requirements under different corrosive environment.