Corrosion resistance of glass fiber
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The bag filters we use are made of either continuous glass fiber or glass fiber needle-punched felt. What is the corrosion resistance of these two materials?
Glass has quite good corrosion resistance; ordinary acids and bases have little effect on it.
Glass fiber with excellent insulating properties, resistant to corrosion and high pressure, and with good water resistance.
Glass fiber exhibits excellent resistance to water, acids, and alkalis. However, its corrosion resistance changes significantly with temperature; generally, for every 10 degrees Celsius increase, its corrosion resistance decreases by 50-100%, and the rate of decline becomes even faster when the temperature exceeds 100 degrees Celsius.
What the original poster mentioned as “continuous glass fiber and glass fiber needle-punched felt” is probably the reinforcing material used in the fiberglass-reinforced plastic shell of the dust collector. Continuous glass fibers and glass fiber needle-punched mats are used as the corrosion-resistant layer in fiberglass-reinforced plastic, accounting for about (25~30%) of the composition; the remainder is corrosion-resistant resin ； On the surface of fiberglass-reinforced plastic that is in contact with corrosive media, there is usually one to two layers of glass fiber or polyester surface felt acting as an impermeability layer, accounting for about (5~10%) of the composition; the remainder is made up of corrosion-resistant resin. The corrosion resistance of fiberglass-reinforced plastic is generally determined by the properties of the corrosion-resistant resin; the glass fibers are surrounded by the resin and do not come into contact with corrosive substances. Glass fiber is not resistant to hydrofluoric acid and sodium hydroxide.
Data shows that glass fiber properties vary depending on the fiber diameter; in other words, the finer the glass fiber, the lower its corrosion resistance. So it depends on the thickness of the glass fibers in these two materials.
Glass fiber provides the strength to fiberglass. Its corrosion resistance and operating temperature are determined by the type of resin used. The typical operating temperature is around 70 degrees Celsius. It can reach up to 120 degrees Celsius as well.
The corrosion resistance of fiberglass-reinforced plastic depends on factors such as the choice of resin, the lamination structure used in the manufacturing process, and the amount of resin contained. Glass fibers merely possess excellent mechanical properties
For general chemical materials, it exhibits excellent corrosion resistance
The main component of glass fiber is silica; it is resistant to acids but not to strong alkalis or solutions containing fluoride ions
The bag filters we use are made of either continuous glass fiber or glass fiber needle-punched felt. What is the corrosion resistance of these two materials? These two terms refer to the product form of glass, and are not related to its material. Generally, depending on the user’s requirements, glass materials that are resistant to acids and alkalis, or those that have no such resistance requirements, can be chosen.