Anti-corrosion knowledge

“Preservative wood is based on the principle of pressurization. The material is placed in a pressure tank, and the wood preservative is injected. The wood preservative is infiltrated into the inner layer of the wood by vacuum pressure, and then vacuumed and pumped out of the tank to dry. It can protect wood for a long time and prolong the life of wood. In countries such as Europe and the United States, the law mandates that outdoor wood must use preservative wood. The market price of preservative wood varies according to the variety of wood.

First, the type of anti-corrosion wood.

1. Nordic red pine.

The high quality European red pine has anti-corrosion, anti-termite and anti-fungal effects after special anti-corrosion treatment. It is specially designed for outdoor use and can be used directly in the environment of contact with water and soil. It is the material of choice for wooden floors, fences, bridges, planks and other wooden pieces in outdoor garden landscapes.

2, Russian scotch pine.

Russian Pinus sylvestris can be directly treated with high-pressure infiltration for full-section anti-corrosion treatment. Its excellent mechanical properties and beautiful texture are highly recommended by designers and engineers. Russia's Pinus sylvestris var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. var. And indoor and outdoor structures can be used. Due to its unique anti-corrosion process, all architectural works can be preserved for a long time.

3. Western red cedar.

Western red cedar is the highest grade of preservative wood in North America. Its excellent anti-corrosion ability comes from an organic material called Thujaplicins; in addition, an acid called Thujic which can be extracted from red cedar ensures that the wood is not eroded by insects and no need to be artificial. Anti-corrosion and pressure treatment. Red cedar has excellent stability, long service life and is not easily deformed. In addition, it is also suitable for high humidity environments, such as saunas, bathrooms and kitchens, for the manufacture of cabinets, wardrobes and other anti-mite and mites. Red cedar is popular in the global market due to its lack of chemical treatment and natural properties.

4, yellow pine (Southern pine).

Yellow pine (Southern pine) has the best strength and specific gravity, has excellent nail holding power, and is the highest strength western cork. Preservatives can be applied directly to the wood core after anti-corrosion and pressure treatment. It can be cut freely during the installation process, and the section does not need to be brushed with anti-corrosion paint. The product can be used in sea water or river water and will never corrode.

The internationally accepted method for preserving wood is to use an insoluble water-based preservative to apply preservatives to the wood fibers while applying pressure to the wood in a closed vacuum tank. The pressure-treated wood is more stable and the preservative can effectively prevent mold, termites and insects from invading the wood. This allows the treated wood to have excellent corrosion resistance for long-term use in harsh outdoor environments.


In the past three decades, the methods of anti-corrosion treatment mainly focused on CCA. Its main chemical composition is Chromated Copper Aarsenate, which is clean, odorless and can be painted on the treated wood surface. It is recognized as an effective antiseptic treatment method in the world. However, in recent years, some people in North America have found a slight allergic reaction to CCA. For this reason, the United States has stipulated that it is no longer allowed to use (except for industrial and housing foundations); Canada also promulgated similar regulations at the end of 2003, completely banned in the right The human body has contact with it.

At present, another kind of anti-corrosion treatment method ACQ has gradually replaced CCA and become the mainstream of the market. The main chemical component of ACQ (Alkaline Copper Quaternary) is an alkyl copper ammonium compound. It does not contain toxic chemicals such as arsenic, chromium, arsenic, etc., and has no adverse effects on the environment, and will not cause harm to humans, animals, fish and plants. This treatment method is better than CCA in terms of human safety. It is now recognized by the US Environmental Protection Agency (EPA) as the most environmentally friendly wood preservative treatment method in the world, and is widely promoted in North America and Europe. However, ACQ is nearly 20% higher in cost than CCA in anti-corrosion treatment.

From the current domestic market, the anti-corrosion wood of these two treatment methods should coexist for some time. However, in the long run, ACQ anti-corrosion treatment will be the future development trend.


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