The most common materials used for the manufacture of flanges are aluminum, stainless steel, ductile iron, and carbon steel.
What are the prevention methods for corrosion in flanges?
1. Maintenance Paint:
Painting for maintenance is the most common way to prevent corrosion of any sort. Maintenance coatings are usually epoxy or polyurethane based, where most coatings adhere directly to the substrate as a hard coat.
When using maintenance paint, one needs to make sure they apply an adequate amount; too thin a layer will make the area invalid and on the other hand, too thick will cause fasteners to bind.
2. Mechanical Solutions:
Mechanical Solutions are usually rigid covers or clamps that seal the flange or the space between the flanges. These covers and clips are made of stainless steel or plastic, attached with rubber seals.
3. Taping:
Taping or using a semi-solid tape can be another effective solution to prevent corrosion. Tapes usually consist of petroleum jelly, wax, or viscoelastic polymers embedded in wrapping cloth, which are specifically used for the waterproofing properties of semi-solid polymers.
It's important to note that all prevention methods have some advantages and disadvantages. There is no solution to completely prevent corrosion from occurring, but regular maintenance and inspection can help prevent rapid corrosion.
 
ductile cast iron flange plate cover
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