Thermal Spray Coatings for Underground Pipelines
Thermal spray coatings can be used to prevent corrosion in underground applications.
One of the most common applications is spraying zinc or zinc/aluminium 85/15 alloy coatings onto spun-cast ductile iron pipes. These pipes are commonly used for potable and waste water applications.
Care needs to be taken to consider the soil conditions and advice should be sought from appropriately qualified corrosion engineers.
Thermal spray coatings are also invaluable in other underground applications such as lighting columns and monopiles for the wind industry, piled into the seabed. The ability to apply a thick coating to specific areas makes thermal spray coatings a natural choice for these applications.
How Long Will a Coating Last?
A thermal spray coating will typically last 10-20 years depending on the material used and how harsh the environment is. See our corrosion protection coatings chart for a better understanding on lifetime resistance.
What are the Advantages of Thermal Spraying?
- Prolongs the life of marine assets, especially those which are routinely immersed in seawater
- Improves the efficiency and performance of marine engines and equipment
- Doesn’t cause distortion to parts during the coating process
- Zinc or aluminium coatings can be applied at virtually any desired thickness
- Acts as a corrosion resistant barrier that protects the underlying metal surface from water, acids, chlorides, and other contaminants
- Reduces heat transfer
Application Data Sheets
Zinc Spraying of Ductile Iron Pipes
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