The active ingredients in preservatives and antiseptic wood refer to the ingredients with real antiseptic effect. Therefore, preservatives and antiseptic wood must be marked with their active ingredients and content, and the supplier must attach the ex-factory inspection sheet. Taking CCA-C preservative as an example, the relative percentage of CuO, CrO3 and As2O5 and the total content of these three components in the product must be indicated.
The relative percentage indicates the comprehensive performance and anti-loss property of the modified preservative, while the total content indicates that the selling price should be determined according to the content of the active ingredient, that is, the selling price of CCA preservative with 30% active ingredient content can only be half of that with 60% active ingredient content. Because 70% of CCA is water, while 60% of CCA contains only 40% water. After purchasing preservatives and antiseptic wood, users can also take random samples and entrust units with inspection capability to test to determine the quality of the preservatives and antiseptic wood purchased.
The problem of erosion resistance of preservatives and antiseptic wood
For wood preservatives and antiseptic wood used outdoors, its anti-erosion property is an important factor determining its service life. CCA, ACQ and other water-borne preservatives prepared according to the specified method and raw material ratio have good anti-erosion performance. However, CCA and ACQ that are not produced according to the specified requirements also appear in the market at present, resulting in poor anti-erosion performance. The service life of the preservative wood treated with this kind of preservative is of course shorter.
The anti-erosion property of the preservative is to immerse the preservative wood in water under laboratory conditions, continuously stir it, and change the water once a day, a total of 14 days. It is calculated by measuring the content of active ingredients of preservatives in water. Users can do some qualitative tests, such as sawing some purchased antiseptic wood, sawing it into small pieces, soaking it in water, stirring it constantly, and after a certain period of time, such as half a day, one day, to see whether the color of the water has turned green, and whether the green is strong or not, that is, to judge whether the erosion resistance of the antiseptic wood is good or not. At present, there are even CCAs that are not allowed to be prepared with CrO3, As2O5 and CuSO4 in the market according to the AWPA standard. Among the ACQ preservatives sold on the market, some of them have very low content of CuO, which can not play the role of corrosion protection that the standard ACQ should have. So users and customers should pay high attention.
With the summary above of Jinan Antiseptic Wood, I hope it can help our customers. If you have any questions or need help, please click our website: http://www.jnajgc.com Or call for consultation, and we will do our best to solve it for you