As there are sulfur and acidic substances on the transported oil, and pipes are exposed to the open air and suffer wind and rain, which causes the pipe to be easily corroded.
Pipeline corrosion mainly contains several following ways, in which oxygen corrosion is the most corrosion.
1. Steel oxygen corrosion caused by the principle of the primary battery;
2. Hydrogen evolution corrosion caused by the surface of the acid sulfide (sulfur dioxide and hydrogen sulfide) caused by acid rain;
3. Carbon dioxide sour corrosion caused by atmospheric precipitation;
4. Bacterial corrosion caused by the germ that can metabolize the sulfate on the surface of the pipeline and the corrosion caused by the hydrops inner pipeline and so on.
As the causes and conditions of pipeline corrosion are not the same, the corrosion of the pipeline based on different corrosion also has the following different ways:
1. Reasonable choose a material, according to different transmission media and environmental conditions to choose different types of materials;
2. Cathodic protection, that is externally adding DC power supply, making the original anode metal turning into the cathode so that it can be protected. Or we can attach a metal that has relatively more active chemical activity to the pipeline, make the two constitute forming the original battery, so the more lively metal will be rusted and the pipeline will be protected;
3. Media processing, including the removal of corrosive ingredients in the media or the mediation of PH value;
4. Add anti-corrosion coating (such as: paint) to metal surface, to cut off the contact of steel pipe and oxygen in the air, to achieve the protective effect;
5. Add "corrosion inhibitor", the corrosion inhibitor is a special additive added in the metal equipment used to slow down the corrosion. Due to the small dosage, investment stable, obvious effect and other advantages, it is prior development direction of pipeline and other areas of anti-corrosion technology. The corrosion principle of corrosion inhibitor can be described as anti-catalytic, that counters to the principle of catalyst used in chemical production. The corrosion inhibitor will increase the activation energy required by chemical reaction, to slow down the rate of corrosion reaction.
Prime Steel Pipe will provide different kinds of pipeline anticorrision according to the different requirements of customers.
