Pipeline corrosion is the oxidisation and electrochemical breakdown of the structure of a pipe used to convey any substance
Pipeline corrosion occurs on both the inside and outside of any pipe and related structures, exposed to corrosive elements. Many different types of corrosion can develop in pipelines. Reactions to the substances carried by pipelines as well is external conditions such as weather all contribute. Its an expensive problem to put right if left untreated. The most common reasons are neglect and poor maintenance.
What are the Most Popular Pipe Materials?
The most common materials used in pipe manufacturing are galvanised steel, iron, copper, polybutene, PVC, chlorinated polyvinylchloride (CPVC) and polyethylene. The type of material used for a pipeline depends largely on it intended use. Galvanised steel is the material of choice for conveying chemicals and gasses such as oil, petrol and gas.
Types of Pipeline Corrosion
Pipelines suffer from a number of corrosion forms, some more common than others. They range from pitting corrosion, uniform corrosion, galvanic corrosion, crevice corrosion and microbiologically influenced corrosion to name a few. Corrosion can also develop in non-metallic pipes such as plastic or even carbon fibre.
Pipeline Corrosion Treatment
Chemical treatment is the main solution for many internal pipeline corrosion problems. Washing the pipe by chemical solutions pumping clears away any corrosion product. Coating and protection of the lining of the pipe by pumping chemicals is next in the process. For external treatment re-coating is the most common, tried and tested treatment. The same treatment applied to any corroded metal. The rust and coorrosion is cleaned from the metal. The pipe is then coated with a specially designed coating to protect it.
Pipeline Corrosion Prevention Techniques Video
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