Biological resistance of electrolessly plated wood (1). Preliminary report
M Hasegawa, K Tsunoda, T Yoshimura
Surface metal coating is considered to improve biological resistance of wood as some metal ions are fungitoxic. Six wood species (three softwoods: Cryptomeria japonica, Tsuga heterophylla and Larix spp; three hardwoods: Fagus crenata, Acer mono and Betula platyphylla) were electrolessly plated with nickel or copper, and those were served for laboratory evaluation of their resistance against decay fungi (Coriolus versicolor and Tyromyces palustris) and subterranean termites (Coptotermes formosanus). On the basis of weight losses after 12 weeks' decay test, all the plated wood species proved resistant against Coriolus versicolor, while none of the treatments could satisfactorily protect wood from decay by Tyromyces palustris. High termite resistance was produced in any case, and especially nickel-plated wood specimens caused 100% mortality of test termites within two weeks.