# Hardide targets longer component life with advanced CVD coatings

- Link: https://www.directorstalkinterviews.com/hardide-targets-longer-component-life-with-advanced-cvd-coatings/4121259386
- Published: 2026-08-05T14:51:00+01:00
- Author: Amilia Stone

Fatigue failure in low-alloy steel usually starts at the surface. Repeated loading,
corrosion, wear and small surface cracks can weaken a component long before the 
underlying steel loses its structural strength. This creates a significant maintenance
and reliability challenge in oil and gas, aerospace, power generation and industrial
processing.

Components such as shafts, hydraulic actuators, valves, downhole tools and flow-
control equipment must often withstand cyclic loading while exposed to corrosive
fluids, abrasion, erosion and adhesive wear.

These conditions can reinforce each other. Corrosion creates pits and increases 
surface roughness. The damaged surface concentrates stress, making cracks more likely
to form under repeated loading. Wear and galling can also produce local defects 
that accelerate the same process.

Using a harder or stronger base material does not always solve the problem. Higher
hardness can improve wear resistance, but it may also increase brittleness and vulnerability
to environmentally assisted cracking. This is particularly relevant in sour-service
conditions involving hydrogen sulphide and hydrogen ingress.

Industry standards can also restrict the hardness of components because of the risk
of sulphide stress cracking. This limits the scope for improving durability simply
by selecting a stronger alloy. Surface protection can therefore offer a more practical
route to extending component life while retaining the cost and structural advantages
of low-alloy steel.

An effective coating must do more than provide hardness. It needs to reduce crack
initiation, prevent corrosion from reaching the substrate and remain attached during
repeated loading. It should also resist chipping, deformation and delamination while
maintaining consistent coverage across the whole component.

Hardide uses a low-temperature chemical vapour deposition process to apply tungsten
carbide-based coatings. The coating is formed from the gas phase, creating a dense,
pore-free layer with a strong metallurgical bond to the component.

The process can coat complex shapes and internal surfaces more uniformly than line-
of-sight alternatives. This allows bores, threads and recessed areas to receive 
protection alongside external surfaces.

_**Hardide plc** (LON:HDD) is a pioneer in advanced tungsten/tungsten carbide CVD
coatings. They showcase unmatched capabilities to greatly extend the life of complex
geometry components facing extreme wear, erosion and corrosion._

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