One of the common and concerning problems of a building structure is corrosion – it weakens the composition of metals, therefore compromising their quality. There are different factors that contribute to the appearance of this problem but determining these factors make preventive and protective methods easy to incorporate.
There are different types of corrosion protection and each of them particularly addresses the special nature of corrosion and the level of protection required. The first type is active corrosion protection which basically halts the continuance or development of corrosion straight from the foundation of the materials. It’s a combination of using corrosion-resistant compounds and inhibitors such as oxidation-resistant sealants.
The second type is passive corrosion protection which is considered the least effective and most primitive as it is simply the utilization of a protective material — often plastic, film, or some weak compound that can easily be torn off or peeled away. Since most corrosive agents are aggressive and can eventually penetrate such protective layers, this type is used mainly as an initial protective effort.
Permanent corrosion protection is the third type. What this does is provide the most effective protective coating that not only coats the material but also strengthens its composition. This permanent protective coating is incredibly versatile as it can make the material resistant to the different corrosive agents caused by various chemical elements, which are usually the result of environmental influences such as moisture, dry air, acidity, et cetera. Epoxy coating is considered the most widely-used permanent corrosion protection; epoxy is chemically stable and the types created nowadays are incredibly durable and can withstand compromising exposures beyond corrosion. Pre-grouted bars are also incredibly effective and are used as a barrier against corrosion attacks in highly aggressive soils rich in both acidic and alkaline components. Other typically used corrosion protection materials are extruded polyethylene and hot dip galvanized bars.
The last type is temporary corrosion protection. This makes use of the desiccant method, protective coating method,and the VCI method. What this type does is directly resist the corrosive action of a particular chemical element. The protection is completely based on the nature of the corrosive. An example of the protective coating method is often used in seaside environments:since saltwater creates rust on the surface of metal structures, a saltwater resistant agent is applied on the metal to counter the effects of seawater. The desiccant method, on the other hand, is used to prevent moisture from weakening the composition of the material it’s protecting (just like those little packets that come with designer bags), while the VCI method suppresses chemical reactions and is considered the opposite of corrosive catalysts.