Key Properties of PVDF
for Analytical Probes in Metal Refining and Processing

In the demanding environment of metal refining and processing, selecting the right materials for analytical probes is paramount. These probes, operating under harsh conditions, require materials that can endure extreme stress without failure. Polyvinylidene Fluoride (PVDF) excels in this regard, particularly when compared to other engineering plastics like Ryton (PPS) and PEEK (Polyetheretherketone). This blog will delve into the specific properties of PVDF, focusing on its performance in terms of coefficient of friction, maximum working temperature, and ASTM D543 chemical resistance rating, along with an example of a hydrometallurgical chemical to which PVDF shows superior resistance.

Low Coefficient of Friction leading to longer probe life

Coefficient of friction is a measure of lubricity which is the ability of a material to reduce friction between it and another surface. Lubricity is an important parameter for analytical probes in harsh environments. Fluoropolymers such as PVDF are widely regarded as having low coefficients of friction relative to other polymers. This characteristic translates into reduced wear and tear during operation and reduced scale and residue accumulation leading to longer probe life and reduced maintenance.

Maximum Working Temperature 150°C (302°F)

PVDF’s maximum working temperature is approximately 150°C (302°F). While this might be lower than the high-temperature resistance offered by PEEK and Ryton, PVDF covers the vast majority of hydrometallugical process temperatures including those of autoclave reactors. This makes PVDF a practical choice for many applications within these temperature ranges.

PVDF Chemical Resistance to reduce degradation and failure

PVDF’s chemical resistance is another standout property. As per ASTM D543 standards, PVDF shows remarkable resilience against a wide array of chemicals. This is crucial in hydrometallurgy, where probes are frequently exposed to aggressive chemicals. For example, versus Ryton and PEEK,
PVDF exhibits excellent resistance to both hydrochloric acid (HCl) and sulfuric acid (H2SO4), both commonly used in metal refining. This ensures the durability and reliability of probes in acidic environments reducing the risk of probe degradation and failure.

Ideal material for analytical probes in metal refining and processing

PVDF’s advantageous properties, including its low coefficient of friction, high maximum working temperature and superior chemical resistance, make it an ideal material for analytical probes in metal refining and processing. Its ability to withstand common hydrometallurgical chemicals like sulfuric acid further underscores its suitability over alternatives like Ryton and PEEK. The use of PVDF in high-performance sensors from IC Controls highlights its unmatched properties in demanding industrial applications. PVDF’s blend of durability, chemical resistance, and temperature resilience makes it the ideal choice for challenging hydrometallurgical environments.

 

Related Links:

Share This Story, Choose Your Platform!