Performance in Testing
Let us continue to look at powder coating a deep dive into durability and efficiency.
Testing and Quality Assurance is an important part of ensuring your product will last the tests of time and the elements.
1. Salt Spray Test (ASTM B117)
Powder coatings typically excel in salt spray tests, showing remarkable resistance to corrosion. Epoxy-based powders, for instance, can withstand 1,000 hours or more before showing signs of corrosion.
2. UV Exposure and Weathering Tests
Tests like ASTM G154 and G155 assess the coating’s resistance to UV light and weathering. Powder coatings, especially those with UV stabilisers, demonstrate excellent colour and gloss retention over extended periods.
3. Impact Resistance
Powder coatings are tested for impact resistance (ASTM D2794) and are found to be extremely resilient, resisting cracking and peeling upon impact.
4. Hardness and Abrasion Tests
These tests assess the coating’s resistance to scratches and abrasions. Powder coatings, depending on their formulation, rate highly on scales like the Pencil Hardness Test, indicating their toughness.
Case Study 1: Automotive Industry Application
Background
In the automotive industry, where durability and appearance are critical, powder coatings are extensively used for components like wheels, bumpers, and engine parts.
Implementation
A major automotive manufacturer switched from traditional liquid paint to a powder coating for their vehicle wheels. The powder used was a polyester-based formula known for its UV resistance and durability.
Results
After several years in service, the wheels showed significantly less wear and tear compared to those with liquid paint. The powder coating resisted chipping from road debris and maintained its gloss and colour despite constant exposure to sunlight and varying weather conditions.
Case Study 2: Outdoor Furniture
Background
Outdoor furniture is subject to harsh environmental conditions. A furniture manufacturer such as Street Space Group seek a durable and attractive finish for their metal structures.
Implementation
The company opted for a powder coating with a UV-resistant top layer. The chosen colour and texture were designed to withstand outdoor elements.
Results
Years later, the furniture maintained its aesthetic appeal with minimal fading. The incidence of rust and corrosion was notably lower than that observed in previously used liquid-coated pieces.
Case Study 3: Industrial Machinery
Background
Durability in industrial machinery is vital due to the harsh conditions and constant use. A factory upgraded its machinery coating to improve lifespan and reduce maintenance costs.
Implementation
The chosen powder coating was an epoxy-polyester hybrid known for its toughness and chemical resistance. The machinery was pre-treated and coated with this durable powder.
Results
The machinery showed a remarkable reduction in surface damage from impacts and abrasion. The coating also withstood chemical spills better than the previous liquid paint, extending the machinery’s service life and reducing the need for frequent touch-ups.
Case Study 4: Architectural Aluminium Extrusions
Background
Architectural aluminium extrusions, used in window frames and facades, require a finish that can endure environmental stressors while maintaining aesthetic qualities.
Implementation
An architectural firm used powder-coated aluminium extrusions for a large commercial building. The powder coating was specifically formulated for exterior use, offering enhanced weatherability.
Results
After a decade, the building’s exterior showed minimal signs of wear. The colour and finish of the aluminium extrusions remained vibrant and intact, withstanding varying climates and UV exposure.