Corrosion Properties on Five Wood Species in an Open Site to Iron

Five wood species i.e. Litsea roxburghii Hassk. (tangkalak), Erythrina fusca Lour. (cangkring), Melaleuca cajuputi Powell (kayu putih), Zanthoxylum rhetsa D.C.(ki tanah) and Sterculia cordata (Blume) BL. (huru leueur) originated from Ciamis and Tasikmalaya were evaluated their corrosiveness to iron metal screw in an open site exposed to sunshine and rain. Wood samples were divided radially into three groups,namely outer, middle and inner part of logs.The corrosion properties were identified by the weight loss of the attached metal screws. Results showed that iron corrosion wasfound in all over tested wood species. Rust discoloration was obtained on 2 weeks after exposing. The corrosion intensities were obtained by the variation of weight loss. Highest corrosion rates wasfound on samples of kayu putih. The highest weight loss of screw was found on kayu putih samples extractedfrom outer part log oftree P-II(Apart), i.e. 5.96%. The lowest weight loss ofscrew was encountered on huru leueur samples extractedfrom outer part oftreeP-II (Apart), i.e. 0. 04%.