The reason why antiseptic wood has such a name is that it can resist corrosion, but it does not include that it can resist all kinds of corrosion. When we use it, we need to understand this kind of situation. Generally speaking, the use effect of this kind of wood is better. When we find its discoloration phenomenon, there are many common chemical discoloration causes. We should pay attention to the following Let's get to know about Shandong preservative wood.

當其長時間地暴露在潮濕的空氣中會發生變色，不是由真菌侵染木材造成的，而是由于木材中的某些成分發生化學反應而引起的，稱為化學變色。

When it is exposed to humid air for a long time, it will change color. It is not caused by fungi infecting wood, but by chemical reaction of some components in wood, which is called chemical discoloration.

防腐木中的單寧、色素、生物堿、糖類、酚類及其它有機物的氧化縮合反應，其中主要的是木材中酚類物質的氧化。酚類化合物具有苯環結構，易于被氧化，這是產生化學變色的原因。酚類化合物氧化前為無色，有些可溶于水;氧化后，生成不溶于水的縮合物，顏色為紅色、紅褐色、褐色，因此化學變色又稱為氧化變色。

The oxidation condensation reaction of tannin, pigment, alkaloid, sugar, phenol and other organic matter in preservative wood is mainly the oxidation of phenol in wood. Phenolic compounds have benzene ring structure and are easy to be oxidized, which is the cause of chemical discoloration. Before oxidation, phenolic compounds are colorless, some of which are soluble in water; after oxidation, they form water-insoluble condensates with red, reddish brown and brown colors, so chemical discoloration is also called oxidation discoloration.

某些防腐木中含有單寧，又稱植物鞣質，是多元酚類的混合物，當在潮濕條件下與鐵接觸，其中的單寧與鐵會發生化學反應(絡合反應)形成單寧酸鐵。單寧酸鐵呈黑色，是用來制造墨水的主要原料，因此使得木材的顏色變黑。根據鐵量的多少和木材與鐵接觸時間的長短，木材的顏色變為淺灰色至藍黑色。同樣，將木材浸泡在含鐵量高的水中，木材也會發生這種化學變色。另外,木材與銅或銅臺金接觸。

Some preservative wood contains tannin, also known as vegetable tannin, which is a mixture of polyphenols. When it comes into contact with iron under humid conditions, the tannin and iron will have a chemical reaction (complexing reaction) to form iron tannate. Iron tannate is black and is the main raw material used to make ink, which makes the wood black. According to the amount of iron and the contact time between wood and iron, the color of wood changes from light gray to blue black. Similarly, when wood is soaked in water with high iron content, the chemical discoloration of wood will also occur. In addition, the wood is in contact with copper or copper gold.

由于木材中的單寧與銅發生化學反應，生成單寧酸銅，也會使木材變色 (淺紅色)。 在木材干燥過程也常發生化學變色。這主要是由于木材干燥速度慢造成的，與墊木接觸的部位尤其如此?；瘜W變色的特點是變色深度淺，變色比較均勻一致。

The tannin in wood reacts with copper to form copper tannate, which can also change the color of wood (light red). Chemical discoloration also occurs during wood drying. This is mainly due to the slow drying speed of wood, especially in the parts contacting with the bedding wood. Chemical discoloration is characterized by shallow discoloration depth and uniform discoloration.

防腐木化學變色便是上述所提到的這類內容，我們在使用此類木材的時候，應該提前了解一下關于防腐木的一些相關事項，尤其是其不適宜的環境生存。倘若大家需要此類木材的話，亦或是想要進一步了解，可以通過一些途徑與我們山東防腐木取得聯系，我們會根據大家的實際需求，為大家提供合適的木材。

Chemical discoloration of preservative wood is the content mentioned above. When we use this kind of wood, we should know something about preservative wood in advance, especially its unsuitable environment. If you need this kind of wood, or want to know more about it, you can contact us through some ways. We will provide you with suitable wood according to your actual needs.