Résistance à la corrosion et à la chaleur des bagues d'étanchéité en carbure de tungstène

In pumps, compressors, and turbines, seal rings are small but vital parts. They stop leaks, protect equipment, and keep systems safe.

But not all seal materials can survive the same harsh conditions. For industries dealing with chemicals, seawater, or high temperatures, the best choice is often the tungsten carbide seal ring.

Tungsten carbide is famous for its dureté, but two of its most valuable properties are corrosion resistance and heat resistance.

These features make it suitable for industries such as pétrole et gaz, chemical processing, marine systems, and power plants.

This article explains how tungsten carbide seal rings resist corrosion and heat, why these properties matter, and what decision-makers should consider when choosing them.

What Are Tungsten Carbide Seal Rings?

Tungsten carbide seal rings are mechanical sealing parts made by pressing and sintering poudre de carbure de tungstène with a binder (usually cobalt or nickel).

They are used where fluids or gases must stay inside pumps, mixers, or compressors without leaking.

Unlike rubber or steel seals, tungsten carbide rings work even in extreme pressure, temperature, and chemical conditions.

Key features include:

Dureté close to diamond
Longue durée de vie
Resistance to wear, corrosion, and heat
Stable performance in harsh environments

Why Corrosion Resistance Matters

In many industries, seal rings are in direct contact with liquids and gases. If the material corrodes, leaks and failures follow quickly.

Main risks of corrosion:

Surface pitting weakens seals
Leaks lead to downtime and safety hazards
More frequent replacement increases cost

Tungsten carbide seal rings, especially those with nickel binder, provide strong corrosion protection. They can resist acids, seawater, and many chemical solutions.

Corrosion Resistance of Tungsten Carbide Seal Rings

1). Nickel-Bonded Tungsten Carbide

Excellent resistance to acids and seawater
Best choice for chemical plants and marine pumps

2). Cobalt-Bonded Tungsten Carbide

Tougher but slightly less corrosion-resistant
Often used in oilfield and mining applications

3). Benefits for Industry

Lower risk of chemical damage
Longer seal life in aggressive environments
Safer operations in critical plants

Why Heat Resistance Matters

Many machines run at high speeds or handle hot fluids. Seal rings that cannot handle heat will lose strength, deform, or fail.

Problems caused by poor heat resistance:

Cracking under thermal stress
Loss of dureté at high temperature
System shutdowns or accidents

Tungsten carbide has high thermal stability, meaning it keeps its hardness and strength even in hot environments.

Heat Resistance of Tungsten Carbide Seal Rings

1). High Temperature Capability

Withstands temperatures up to several hundred degrees Celsius
Maintains sealing ability even in turbines and refineries

2). Thermal Shock Resistance

Resists cracking when temperatures change suddenly
Safer for pumps and compressors exposed to varying conditions

3). Benefits for Industry

Reliable sealing under hot conditions
Reduced maintenance in power and energy plants
Longer service life compared with steel or ceramic rings

Corrosion and Heat Resistance Working Together

The real strength of tungsten carbide seal rings is their ability to handle both chemical attack and high temperature at the same time.

Par exemple:

In offshore oil rigs, they resist both seawater corrosion and hot drilling fluids.
In chemical refineries, they withstand hot acids and solvents.
In power plants, they survive high-pressure steam without losing hardness.

This combination makes tungsten carbide one of the most balanced choices for critical industries.