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COATING TECHNOLOGY


n innovative coating process is providing a simple and economical alternative to electro coating – and for one European manufacturer, adoption of the technology has underpinned its survival. In this instance, the process not only delivered conformity with increasingly tight environmental legislation, enabling production to continue, but it also boosted product quality.


A Radiateurs Industrie has been a major


player in the French domestic heating market for over half a century and is the sole manufacturer of panel radiators in France. It currently produces around 400,000 radiators per year. Until the end of 2015, the company still operated a conventional dip paint primer process that contained solvents. Tese had to be eliminated in line with new EU law in favour of a sustainable, water-based process. Trough its Bonderite brand, Henkel is a leading player in metal pre-treatments and functional coatings, known for its ability to develop cost-effective, customer- tailored solutions. Te company proposed its Bonderite M-PP process as a solution to Radiateurs Industrie’s compliance problems and the method whereby the company could also greatly improve the aesthetics and corrosion resistance of its radiator products.


CHALLENGING REQUIREMENTS Te new paint process had to be 100% solvent-free, compact enough to fit into the new extension to the factory and of course, cost-competitive. Te primer coating’s compatibility with the powder top-coating was also essential and the process was required to create a uniform thickness over the entire radiator surface, even on the difficult-to-reach internal convector plates. Additionally, the coating had to be transparent.


The innovative Bonderite M-PP


coating process provides a simple and economical alternative to electrocoating


New approach delivers compliant painting process for radiators COATINGS COST-EFFECTIVE Te combination of these factors made


this a particularly challenging project and Henkel had to be highly innovative to meet tough cost targets, but the end result was a great achievement. Operational since 2016, Radiateurs Industrie’s new Bonderite M-PP process is now able to coat complex ferrous metal parts uniformly, including inside tubes and sharp edges.


Te chemical composition of the process


Bonderite M-PP provides corrosion protection uniformly, including cavities or sharp metal edges


42 www.engineerlive.com


is entirely free of solvents and VOCs and its low environmental impact is complemented by very little energy consumption and minimal wastewater. Te process starts with alkaline degreasing, tap water and reverse osmosis water rinses. Te coating is then applied and stoved at 90°C.


THE HAPPY CUSTOMER Raphaël Alain, operations director of Radiateurs Industrie comments: “Transitioning from the traditional solvent process to Henkel Bonderite M-PP was an obvious choice once we realised how easy and robust it is. It’s also able to coat three million square metres of complex shaped components per annum without subjecting them to an electric current. And as proof of its simplicity, it worked perfectly from the first day of production.”


For more information visit www.henkel.com


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