Conformal Coating: Protecting Electronics in Harsh Industrial Environments
Industrial computers and embedded systems are often deployed in environments far more demanding than typical office or consumer settings. From factory floors and offshore platforms to transportation systems and outdoor installations, electronic hardware must operate reliably despite exposure to dust, moisture, chemicals, temperature extremes and vibration.
One of the most effective ways to improve reliability and longevity in these challenging conditions is conformal coating. This protective layer helps safeguard sensitive electronic components from environmental hazards that could otherwise lead to system failures, downtime and costly repairs.
In this article, we explore what conformal coating is, how it works, and why it plays a critical role in industrial computing systems.
What Is Conformal Coating?
Conformal coating is a thin protective polymer layer applied to printed circuit boards (PCBs) and electronic assemblies. As the name suggests, the coating “conforms” to the contours of the board and its components, forming a protective barrier without interfering with electrical functionality. This protective layer is typically applied using processes such as:
- Spray coating
- Dip coating
- Selective automated coating
- Brush application (for small-scale or repair work)
Once applied and cured, the coating forms a transparent insulating barrier that shields electronic circuits from environmental contamination and mechanical stress.
Why Industrial Electronics Need Protection
Industrial environments often expose electronics to conditions that can quickly degrade unprotected hardware. These include:
- Moisture and Humidity: Moisture can cause corrosion, electrical leakage, and short circuits on circuit boards. Condensation is especially problematic in environments with fluctuating temperatures.
- Dust and Contaminants: Industrial sites frequently contain airborne particles such as dust, metal shavings or chemicals that can settle on electronic components and disrupt performance.
- Chemical Exposure: Manufacturing environments may expose equipment to oils, solvents, salt spray, or other corrosive substances that damage sensitive electronics.
- Temperature Extremes: Industrial systems often operate in environments with wide temperature ranges, which can lead to condensation or material expansion and contraction.
- Vibration and Mechanical Stress: Equipment deployed in vehicles, heavy machinery or transportation systems must withstand continuous vibration and movement.
Conformal coating provides a protective barrier against these hazards, helping maintain long-term reliability.
Types of Conformal Coatings
Several types of conformal coating materials are used in industrial electronics, each with different strengths depending on the application.
- Acrylic Coatings: Acrylic coatings are one of the most common options due to their ease of application and removal. They provide good protection against moisture and contamination while remaining relatively cost-effective.
- Silicone Coatings: Silicone coatings perform well in high-temperature environments and offer excellent moisture resistance. They are often used in automotive, aerospace and outdoor systems.
- Polyurethane Coatings: Polyurethane coatings offer strong resistance to chemicals and solvents, making them suitable for industrial environments where exposure to aggressive substances is common.
- Epoxy Coatings: Epoxy coatings provide extremely durable protection but can be more difficult to remove or repair once cured.
- Parylene Coatings: Parylene is applied using a vacuum deposition process, creating an extremely uniform and thin protective layer. It provides exceptional environmental protection but is generally used in specialised applications due to higher costs.
Key Benefits of Conformal Coating
Applying conformal coating to electronic assemblies provides several important benefits for industrial computing systems.
- Improved Reliability: By protecting against moisture, dust and contamination, conformal coatings help prevent short circuits, corrosion and electrical leakage.
- Extended Product Lifespan: Electronics operating in harsh environments can degrade quickly. Conformal coating significantly extends the operational life of circuit boards.
- Reduced Maintenance and Downtime: Protecting electronic assemblies reduces the likelihood of failures that could disrupt operations or require costly repairs.
- Enhanced Environmental Resistance: Systems coated with protective layers are better equipped to withstand extreme environments such as offshore installations, transportation systems or industrial automation equipment.
- Increased System Stability: Conformal coating helps maintain consistent performance even in demanding operating conditions.
Where Conformal Coating Is Used
Conformal coating is widely used across industries where electronics must operate reliably in harsh conditions. Common applications include:
- Industrial automation and manufacturing systems: Protecting factory PCBs from dust, heat, and vibration.
- Transportation and railway electronics: Ensuring reliable operation of train and vehicle control systems.
- Oil and gas equipment: Safeguarding electronics from moisture, chemicals, and extreme conditions.
- Marine and offshore systems: Shielding shipboard electronics from saltwater and corrosion.
- Defence and aerospace electronics: Maintaining performance of rugged systems in tactical and high-altitude environments.
- Outdoor IoT and smart infrastructure devices: Keeping sensors and devices functional in weather-exposed urban environments.
In these environments, conformal coating provides an essential layer of protection that helps ensure systems continue to operate safely and efficiently.
Conformal Coating in Industrial Computer Design
For industrial computer manufacturers, reliability is a critical design consideration. Protecting internal electronics from environmental damage can significantly improve system durability and long-term performance. When combined with other rugged design features such as:
Conformal coating helps create computing platforms capable of operating 24/7 in demanding industrial environments.
Contact BVM for Industrial Computing Solutions
At BVM, we don’t just supply industrial and embedded computers — we design and engineer them from the ground up. Whether you need a complete PC solution, a ruggedised embedded system, or a custom carrier board and PCB design for your project, our experienced team can help. With over 35 years of expertise in industrial and embedded computing, we specialise in creating solutions built for harsh environments, AIoT applications, and mission-critical systems.
Let BVM help you design, manufacture, and deploy industrial computing hardware that meets your exact requirements — from custom PCBs to full industrial PC systems.
Ready to Discuss Your Project?
Contact BVM for all your Industrial and Embedded Computing OEM/ODM design, manufacturing or distribution needs. With over 35 years of experience, we supply standard hardware and design custom solutions tailored to your requirements.
Reach our expert sales team on 01489 780144 or email us at sales@bvmltd.co.uk.