Hot-dipped aluminum technique method of heavy duty automobile exhaust tube

Abstract

The invention discloses a technological method of aluminizing by hot dipping of an exhaust pipe of a heavy-duty car. The technological method solves the problems that the existing treatment method of the exhaust pipe of the heavy-duty car can not meet the requirement of corrosion resistance, and the like, and has the advantages of being simple, prolonging the service life of the exhaust pipe of the heavy-duty car, rendering the exhaust pipe more artistic in appearance and indirectly prolonging the service life and increasing the reliability of an exhaust gas braking system, and the like. The technological method of the invention comprises the steps: (1) the exhaust pipe is done with surface treatment; (2) the exhaust pipe is treated with alkali cleaning; (3) clean water is used for removing residual alkali liquor on the surface of the exhaust pipe; (4) acid washing is followed; (5) clean water is used for removing residual acid liquor on the surface of the exhaust pipe; (6) the dip coating of plating supporting agent is done to the surface of the exhaust pipe; (7) the exhaust pipe is put into a drying oven to be dried; (8) after being dried, the exhaust pipe is put into an infiltration agent; (9) the aluminizing by hot dipping is then followed; (10) the product is cooled; and (11) the post treatment is carried out to the product to obtain the finished product.

Description

[0001] The field of technology is not available within the year [0002] The invention relates to a process method for hot-dip aluminizing of exhaust pipes of heavy-duty vehicles. Background technique [0003] Due to the large engine power and harsh working environment conditions of heavy-duty trucks, the exhaust system is exposed to high temperatures (the outlet temperature of the supercharging port can reach more than 500°C), large temperature differences, and parts in harsh environments are more likely to corrode. Exhaust system components adopt traditional surface treatment processes such as high-temperature paint spraying and Dacromet spraying (the temperature resistance of the two processes does not exceed 300°C), etc. Time has proved that when the exhaust system adopts these surface treatment processes, corrosion will occur in the same year, and even corrosion spots can be seen in the same month, and the service life is extremely short; moreover, the exhaust system is e...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the current heavy-duty vehicle exhaust pipe treatment process cannot meet the anti-corrosion requirements, etc., to provide a simple and convenient method, which can improve the service life of the heavy-duty vehicle exhaust pipe, increase the appearance of the exhaust pipe, and indirectly improve the performance of the exhaust pipe. Process method of hot-dip aluminizing for exhaust pipe of heavy-duty vehicles, which has the advantages of life and reliability of exhaust gas braking system