The raceway and supporting wheel of the fully automatic small concrete mixer are important parts of the mixer for transporting concrete. Their quality directly affects the normal operation of the vehicle. The following is a brief introduction to relevant issues.
1. Sulfuric acid washing method
The sulfuric acid pickling method of the mixing car raceway uses sulfuric acid aqueous solution with a mass concentration of 50-200 g/L, and the pickling temperature of the mixing car raceway is usually between 60 and 80. Sulfuric acid is an oxidizing acid, and its pickling speed is lower than hydrochloric acid. Sometimes, in order to speed up the acid cleaning, ultrasonic can be used as an auxiliary means for cleaning the raceway of the mixer truck.
2. Hydrochloric acid pickling
The hydrochloric acid pickling method of the mixing car raceway adopts hydrochloric acid aqueous solution with a mass concentration of 50-200 g/L, and the pickling temperature of the mixing car raceway is usually below 40. Hydrochloric acid is a reducing acid with strong pickling ability. When the mixing truck raceway is cleaned and used, it may also lead to excessive corrosion of the oxidized metal substrate under the skin. Therefore, urea is often added to protect the metal matrix during the pickling process of the mixer raceway.
After the fully automatic small concrete mixer truck is put into use, the ideal state of the roller track and supporting wheel of the mixer truck is to form a bright surface on the friction surface of the roller track and supporting wheel after cold work hardening.
However, due to the user's nonstandard use and operation of the mixer truck and the defects in the manufacturing process, the moving pair of the mixer truck raceway and supporting wheel can not reach the ideal state in the use process, and the surface will appear peeling, scratching, grooving and other phenomena. Come to our website for more relevant content Consult!