Advanced composite materials have made its place across various industries in today’s world. With its ever-expanding applications many sectors are switching to composites, leaving behind traditional materials. And why not? These advanced composites offer incredible properties such as high strength, low weight, corrosion resistance, and, above all, chemical resistivity. Of the many advanced composite materials, three most prominent ones are carbon fiber, basalt fiber, and glass fiber. Each of them perform have different levels of chemical resistance that can be explored with their application.

In this blog, we'll explore the chemical resistivity of carbon, basalt, and glass fibers and their products, along with strengths and drawbacks, and aid you in selecting the most suitable material for your needs.

Chemical Resistance of Advanced Composite Materials

Composite fibers such as carbon, basalt and glass generally have excellent chemical resistivity in comparison to traditional materials. So, what does chemical resistivity mean? Chemical resistivity or resistance refers to a material's ability to withstand the effects of various chemicals including acids, alkalis, solvents, and oils, that can damage the composite material and prevent its proper functionality. Occasional or prolonged contact with chemicals can cause the fiber's weakening, degrading properties, or even complete failure. So, understanding composite materials in regards of chemical resistance is necessary to plan their use in various applications.

Carbon Fiber and Chemical Resistance

Carbon fiber composites are renowned for their exceptional strength-to-weight ratio and stiffness. They have been a popular option in automobiles, aerospace, orthopedic parts, structural strengthening materials, marine, and more. Though the composite performs excellently in many aspects, but the chemical resistance is a mixed with no clear winner. It has both strengths and drawbacks, so a proper understanding is needed before you plan its application.

Strengths of Carbon Fiber:

• It has an excellent chemical resistance to a wide range of acids, including common ones such as hydrochloric acid (HCl), sulfuric acid (H2SO4), and nitric acid (HNO3). This makes them suitable for applications exposed to acidic environments, such as high-strength and low-weight chemical storage tanks or industrial components.

• It showcases good resistance to common organic solvents, such as alcohols and ketones.

Drawbacks of Carbon Fiber:

• Susceptible to strong alkalis, like sodium hydroxide (NaOH) and potassium hydroxide (KOH), which limits its use in highly alkaline environments.

• Prone to oxidation at high temperatures (above 200°C) weakens the material.

Basalt Fiber and Chemical Resistance

Basalt fiber is a naturally occurring rock derivative. With a high elastic modulus, it has excellent properties of high mechanical strength, temperature resistance, good chemical stability, low energy consumption, and an environmentally friendly production process. The composite performs fairly well in the aspect of chemical resistivity. The application of the composite material in harsh environments depends

Strengths of Basalt Fiber:

• Exceptional resistance to acids and alkalis. The ideal for applications exposed to harsh chemical environments, such as wastewater treatment plants or chemical processing facilities.

• Excellent resistance to weathering caused by ultraviolet (UV) light, moisture, and salt spray, making them suitable for outdoor applications.

Drawbacks of Basalt Fiber:

• With lower tensile strength than carbon fiber it is not suitable in applications requiring maximum structural rigidity.

• Basalt fiber production is still growing and availability is less readily accessible than carbon or glass fibers in certain regions.

Glass Fiber and Chemical Resistance

Glass fiber, a versatile and cost-effective material, is widely used across various industries.

Strengths of Glass Fiber:

• Good resistance to most acids, making them suitable for applications involving moderately acidic environments.

• Excellent electrical insulation, making it a valuable choice for electrical components and applications requiring non-conductivity.

Drawbacks of Glass Fiber:

• Highly susceptible to degradation by alkalis, making them unsuitable for use in environments with high alkaline concentrations.

• Susceptible to UV degradation, therefore limiting their suitability for long-term outdoor applications without proper protection.

Selecting the Right Composite Fiber:

The optimal fiber choice depends on the specific application and its anticipated chemical environment. Here's a quick reference based on chemical resistance:

• For applications exposed to strong acids and alkalis, Basalt fiber emerges as the clear winner.
• For applications requiring exceptional strength-to-weight ratio and moderate acid resistance, Carbon fiber could be the ideal choice.
• For cost-effective solutions with good acid resistance and electrical insulation, Glass fiber can be a suitable option in applications with minimal exposure to alkalis and UV light.

Carbon fiber, basalt fiber, and glass fiber each offer unique advantages and disadvantages in terms of chemical resistivity. The choice of a particular composite material depends on the

product and application.

For all your needs of carbon fiber composite products, explore NitPro Composites. A leading name, NitPro assures latest in the manufacturing industry, high-quality products adhering to industry standards. Choose carbon fiber rods, sheets, tubes, CNC parts, and fabric in customized sizes and dimensions.

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