Means To Protect Against Corrosion

In any marine, transportation, chemical processing, papermaking or petroleum applications there are some products used along the assembly line to protect against corrosion the equipment. These products that protect against corrosion are normally applied on ships, water tanks, oil pipelines, buried vessels, and transmission line towers, or any other parts that might become subject to some environmental factors that cause corrosion among other things.

In fact, corrosion is the electrochemical degradation of metal due to reaction with the environment and in order to provide protection against it one must think of other chemical substances that overcome the effects. That is why the products used to protect against corrosion function on the basis of two types of inhibitors, the anode inhibitors and the cathode inhibitors. The anode inhibitors protect against corrosion by forming a soluble compound with a newly produced metal ion. The protected surface must be connected to a more anodic metal through a wire, which leads to the concentration of corrosion in the later and not in the first. The metal to which the initial surface is connected is sometimes called the sacrificial anode. While the sacrificial anode is the one that corrodes, the equipment that is to be protected stays unaffected by corrosion. The second type of products used to protect against corrosion are the cathodes inhibitors which produce hydrogen through a chemical reaction in an acidic solution. Both variants are added in small quantities to metals and equipment made of metals that are exposed to damaging environments.

There are also products that protect against corrosion by using the so called cathodes rectification process, but they are more complicated to use. Their application is mainly functional in large structures such as ships, or for long term operations such as naval deployments.

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