Nodular cast iron pipe outer surface anti-corrosion treatment technology

Abstract

The invention belongs to the technical field of cast iron pipe corrosion prevention, and particularly discloses a nodular cast iron pipe outer surface anti-corrosion treatment technology. An oil coating device used in the nodular cast iron pipe outer surface anti-corrosion treatment technology comprises a base plate. An installation frame is fixed to the top end of the base plate, a push rod motoris fixed to the top end of the installation frame, and a push disc is installed at the output shaft end of the push rod motor in a rotating mode. A rectangular plate is fixed to the top end of the base plate, and a circular through hole is formed in the side wall of the rectangular plate. A rotating ring is installed on the side, facing the push rod motor, of the rectangular plate in a rotating mode, and steel wire brushes are fixed to the inner side wall of the rotating ring at equal intervals in the circumferential direction of the rotating ring. According to the nodular cast iron pipe outer surface anti-corrosion treatment technology, a protective oil layer coats the surface of a cast iron pipe which is subjected to rust removal treatment, a membrane is wound around the surface of thecast iron pipe, the surface of the cast iron pipe can be isolated from the air, and therefore the problem that rust is generated on the surface of the cast iron pipe again in the storage or transportation process is prevented from happening, and then the effect and the efficiency of cast iron pipe outer surface corrosion prevention are improved.

Description

technical field [0001] The invention belongs to the technical field of anticorrosion of cast iron pipes, in particular to an anticorrosion treatment process for the outer surface of nodular cast iron pipes. Background technique [0002] Spheroidal graphite cast iron is obtained through spheroidization and inoculation treatment, which effectively improves the mechanical properties of cast iron, especially improves plasticity and toughness, thereby obtaining higher strength than carbon steel. Ductile iron is a high-strength cast iron material developed in the 1950s. Its comprehensive performance is close to that of steel. It is based on its excellent performance that it has been successfully used to cast some complex stress, strength, toughness, and wear resistance. Parts with high performance requirements. The so-called "substituting iron for steel" mainly refers to ductile iron. [0003] Ductile iron pipe is a kind of cast iron pipe. In terms of quality, it is required th...

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Problems solved by technology

[0004] In the prior art, there are also some technical solutions about the anti-corrosion of the outer surface of cast iron pipes, such as a Chinese patent with application number 2014104906161, which discloses an anti-corrosion treatment process for the outer surface of ductile iron pipes. The surface is treated with steam curing, and the outer surface of the cast iron pipe is sprayed with a protective coating to surface the cast iron pipe. However, in the hot and humid southern region, the pretreated cast iron pipe is easy to regenerate rust without any protection. Thereby affecting the effect of anti-corrosion, according to this, the present invention proposes a kind of anti-corrosion treatment process for the outer surface of ductile iron pipes

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