| 摘要 |
A method is provided for protecting wood against undesirable reactions caused by microorganisms. According to the present invention wood is washed with an acid in order to remove at least a part of those transition metals contained in the wood which are essential for the mechanism of decay and other metabolic reactions of rot fungi. Preferably, wood is washed with a mineral acid or a solution thereof having a pH in the range of 0.5 to 2, whereby at least about 30 % of the iron and the manganese is removed. In order to prevent contamination caused by metals from the soil and coming with rain water, monovalent cations can be attached to the wood instead of the removed transition metals. By means of the present invention it becomes possible to protect wood against decay, blue-staining and moulding in a simple, non-toxic way. |
