Xinghui New Materials is a professional enterprise engaged in the research and development, production, and sales of anti-corrosion carbon bricks and impregnated anti-corrosion carbon bricks. We are committed to providing high-quality, acid resistant, and corrosion-resistant graphite carbon bricks for chemical plants to ensure smooth industrial production.

There are several methods to evaluate the quality and effectiveness of carbon brick impregnation, including the following:

(1) Weight gain rate. The evaluation of impregnation quality is often determined by measuring the weight gain rate of the impregnated product. The weight gain rate refers to the ratio of the weight gain of the same carbon billet after impregnation (i.e. the mass immersed in impregnating agent) to the mass of the carbon billet before impregnation. The higher the impregnation weight gain rate, the better the impregnation effect. The impregnation weight gain rate rapidly decreases with the increase of impregnation times.

(2) Filling rate. The evaluation of impregnation effect can determine the filling rate of impregnation, which is the ratio of the volume occupied by the impregnating agent asphalt entering the pores of the filled carbon blank to the total volume of all pores. The higher the impregnation filling rate, the better the impregnation effect.

(3) Immersion depth. Both of the above methods have certain limitations, and the evaluation of impregnation quality should also focus on whether the carbon billet has been impregnated, that is, whether the uniformity of the density inside and outside the carbon billet is guaranteed. Usually, the carbon billet should be impregnated and the coal tar pitch inside the pores should reach saturation.

In production, the impregnated product can be broken to observe the immersion depth of coal tar on the carbon billet from the cross-section. Qualified impregnated products should not show any sections that have not been impregnated.

(4) Ultrasonic testing. According to the principle that the diffusion speed of ultrasonic waves in carbon billets is related to their density, the impregnation quality of carbon brick green billets can be identified through ultrasonic technology.

(5) Theoretical weight gain rate. Abroad, theoretical weight gain rate is also used to determine the impregnation effect. The so-called theoretical weight gain rate refers to the maximum weight gain rate calculated by the impregnating agent asphalt entering all the pores or voids inside the carbon brick green body. The theoretical weight gain rate is only related to the properties of the impregnating agent asphalt and the properties of the fired carbon brick green body (bulk density and true density). The higher the density of the impregnating agent asphalt, the greater the theoretical weight gain rate.

In actual production, if the cross-section of the carbon billet can be soaked, but the weight gain rate does not meet the requirements, it indicates that the impregnation quality has not reached the optimal effect, that is, the impregnating agent asphalt has not reached saturation state, and there is still potential for further improvement.