Filiform corrosion is a tricky form of corrosion that often occurs under thin coatings. It is typically formed in a threadlike filament, from which it derives its name. It commonly forms on metallic surfaces that are covered or coated with a thin film, often meant to prevent or deter corrosion from forming. Filiform corrosion thrives in this environment where other types of corrosion are usually deterred. For ideas on how to prevent filiform corrosion in your metals, check out this guide.
Learn to identify it
There are many different classifications and types of corrosion that could be affecting your metal items. To identify filiform corrosion, rather than a more common type such as galvanic corrosion, you will need to look at and under the metal’s coating. With filiform corrosion, you may notice that the metal’s coating is bulging, appearing fuller than normal, or even cracking. This is a sure sign that filiform corrosion has invaded your metal. This is one of the forms of corrosion that is visible to the naked eye. The first step in preventing filiform corrosion is knowing how to recognize it before it becomes a large-scale problem.
Control the humidity levels
Wherever your metal is located, be sure to keep the humidity under control, if possible. High levels of humidity contribute to more rapid filiform corrosion formation. If your metal is located in a place where temperature and humidity control is possible, it is worth the investment to save your metal and its coatings from the costly damage of filiform corrosion. Humidity creates more moisture in the air, which can get trapped under metal coatings.
Use brittle coatings
Using a brittle coating over your metal materials is more advantageous if you’re worried about the development of filiform corrosion because it will not contain the moisture in the same way a strong, durable coating will. This can help the moisture from humidity or other moist conditions detach from the metal before becoming corroded.
For the best corrosion prevention, invest in a corrosion survey from Dreiym Engineering. Our talented team of certified engineers can help develop the best corrosion prevention plan for your needs.