Pine oil of anticorrosive wood is generally a product that has not been dried and degreased. At the same time, the overflow of pine oil will become a breakthrough for edible organic bacteria and insects to erode wood, and will gradually rot in the early stage of use. Only by degreasing and drying the wood can we ensure the permeability and drug loading of preservatives and meet the national quality standards of preservative wood.
Degreasing technology is to make the oil in Pinus sylvestris var. mongolica. Pinus sylvestris var. mongolica overflows with the evaporation of water in wood at 80 degrees high temperature and humidity 192 hours, thus achieving the purpose of basic degreasing. At present, many merchants in the market have low cost and have not dried and degreased.
For preservative wood treated with turpentine:
1. Alkaline washing method uses 8% ~ 10% water filtrate of baking soda (edible alkaline noodles) or 4% ~ 6% caustic soda filtrate to clean the position of pine oil in Chinese fir to saponify pine oil (oil and alkali react into towels and nitroglycerin), and then dip it in hot water (40~50℃) with a sponge or brush.
2. Wash 20 grams of bleaching powder, add 0.5 kg of warm water to dissolve it, use this filtrate to brush the position of Chinese fir repeatedly with pine oil until it turns slightly white, and then rinse it with electricity.
The eradication method can remove all the oozing pine oil with a shovel handle and then smooth it with mud. No matter which solution is used, it needs to be scrubbed again with alcohol (petroleum) or coated with shellac enamel to prevent pine oil from seeping out of Chinese fir and causing the paint film to react.
4. Dissolution method uses 25% amfepramone hydrochloride filtrate to dissolve, and can also be washed with a mixture of 20% amfepramone hydrochloride filtrate and a large amount of alkali.