Electrostatic Coating Application in the Marine Industry
The marine industry is under increasing pressure to adopt more sustainable operations and reduce waste. One technique gaining traction is electrostatic coating application, which offers a more controlled and precise way to apply hull coatings compared to traditional airless spraying.
How Electrostatic Spray Works
Electrostatic spraying relies on a simple concept: opposites attract. Applicators use an electrostatic spray gun to charge paint particles, which are drawn to the grounded steel hull like a magnet. This process requires lower paint pressure when compared to traditional airless spraying, improving transfer efficiency and atomization.
- Applicators use an electrostatic spray gun to charge paint particles.
- The charged particles are drawn to the grounded steel hull like a magnet.
- Lower paint pressure improves transfer efficiency and atomization.
Benefits of Electrostatic Coating Application
Electrostatic coating application offers several benefits, including:
- Improved transfer efficiency and atomization
- Reduced overspray and airborne paint particulates
- Increased surface smoothness and uniformity
- Reduced material waste and cleanup time
- Improved safety conditions for applicators
Where It Works Best
Not every hull coating can be applied using electrostatic spraying. Conventional fouling control coatings often lack the properties needed to hold a charge or flow evenly under electrostatic conditions. In contrast, formulations developed specifically for this method can distribute evenly across grounded steel and build a smooth, durable film.
Examples of Electrostatic-Compatible Coatings
* PPG NEXEON antifouling
* PPG SIGMAGLIDE fouling release coatings
Performance in the Field
In a recent drydocking, EDR shipyard in Antwerp, Belgium, used electrostatic spraying to apply a fouling release coating to a Stena Line RoRo passenger vessel. The yard reported a 40% reduction in overspray compared to conventional airless spray methods.
| Benefit | Percentage Reduction |
|---|---|
| Overspray reduction | 40% |
| Cleanup time reduction | 30% |
| Material waste reduction | 25% |
Environmental and Workplace Impact
Electrostatic coating application offers benefits for shipyards seeking to enhance both environmental performance and operational efficiency. By reducing airborne paint particulates and overspray, the technique creates a cleaner workspace and improves safety for application crews.
Benefits for Shipyards
* Reduced environmental impact
* Improved safety conditions for workers
* Smoother operations without needing to invest in new infrastructure
Adoption and Training
Electrostatic application of marine coatings is being adopted by shipyards across Europe, Asia, and the Middle East. Application crews typically transition smoothly with targeted training. Recent investments by paint and coatings companies in equipment and technical support have helped more yards integrate electrostatic spraying into their workflows.
Factors Driving Adoption
* Sustainability goals
* Regulatory compliance
* Improved coating quality and performance
What Comes Next
Techniques like electrostatic application stand out as the marine industry works toward more sustainable operations. The method provides measurable gains without disrupting yard operations or requiring major infrastructure changes.
Recommendations for Shipowners and Operators
* Consider electrostatic application as part of their broader strategy
* Include electrostatic-compatible hull coatings in their drydock specifications
* Align choices with sustainability goals
About the Author
Joanna van Helmond is PPG Product Development Director for Marine and Protective Coatings. She brings more than 20 years of experience in fouling control development and strategy and sustainable coating technologies within the maritime industry.
Expertise
* Fouling control development and strategy
* Sustainable coating technologies
* Marine industry expertise
Conclusion
Electrostatic coating application offers a more controlled and precise way to apply hull coatings compared to traditional airless spraying. By improving transfer efficiency, reducing overspray and airborne paint particulates, and increasing surface smoothness and uniformity, electrostatic coating application provides measurable gains without disrupting yard operations or requiring major infrastructure changes. Shipowners and operators can benefit from improved coating quality, reduced material waste and cleanup time, and enhanced environmental performance. As the marine industry continues to work toward more sustainable operations, techniques like electrostatic application will play a critical role.
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