Industrial Supplies and Other Stuff

You can increase the corrosion resistance of hollow sections by implementing several measures during the installation of those sections. This article discusses some of those helpful measures.

Minimise Holes

One way to limit the chance of corrosion to the internal surfaces in hollow sections is by keeping your use of rivet or bolt holes low. Those holes can create an opportunity for moisture to get into the interior of the hollow section through capillary action. Use as few bolts or rivets as possible during the installation so that such moisture ingress is avoided.

Fill the Voids

You could also consider filling the internal void of hollow sections in order to keep corrosion at bay. For example, you can use concrete to fill those voids. This option is particularly helpful if the hollow sections are being used for a structural purpose, such as constructing columns in a building. The fill material will increase the weight-bearing ability of the hollow sections while preventing agents of corrosion from reaching the interior surface of the sections.

Use Rubber Gaskets

At times, it may not be feasible or desirable to fill the voids with concrete because the voids are needed for another purpose, such as running electric cables through them. In such a case, it is advisable to use rubber gaskets to seal the ends of those hollow sections so that agents of corrosion, such as corrosive gases, can be prevented from reaching the internal surfaces of the hollow sections.

Install Pressure Holes

Seals at the ends of the hollow sections may develop leaks and allow water to get into the sections through aspiration. Such an eventuality can be prevented by creating a pressure equilibrium hole at a carefully selected point where gravity cannot enable water to enter the voids through this hole. The hole will ensure that there is no pressure difference between the exterior and interior of the improperly sealed hollow sections. Corrosion resulting from the aspiration of moisture will therefore be avoided.

As you may have noticed, the discussion above focused on how the internal surface of hollow sections can be protected further from corrosion. This attention is due to the fact that corrosion protection coatings are usually placed on the exterior surfaces only since the internal surfaces aren't exposed to the elements. The measures above should therefore be used in cases where there is a likelihood that the interior of the hollow sections is at risk of exposure to agents of corrosion. Discuss your concerns with an expert so that he or she can advise you about the most suitable option among the suggestions given on how to enhance the corrosion resistance of your hollow sections.