Technical appendix Surface protection The standard coating is resistant to: Priming or powder- Prior to painting, the surface The triple treatment of outer • Mineral oils coating suitable for scuffing or the use of a chemicalneeds to be prepared by physical electrophoretic dipcoat priming • Machining emulsions etching agent.over-painting• Lubricants surfaces – Nano coating, and textured powder-coating After careful cleaning of the Physical scuffing would be like – provides optimum corrosion • Solvent (briefly as for cleaning) surface, the standard coating a 300 grit 3M pad; chemical protection for enclosures such • Weak acids and alkalines may be over-painted with: etching agents would be Xylene as TS, AE and KL. To ensure This has been tested and confirmed • DD gloss paints or Toulene. in extreme climates, aluminum institutes. gloss paints Special coatingsdual-componentand• Singleby various independent test optimum corrosion protection or zinc-plated metal with subsequent zinc phosphating process monitoring. • Car repair paints For the best possible resistanceQuality is ensured by continuousChemical paint: and powder-coating are used for • Powder paints to organic and inorganic outdoor enclosures. • Water-based paints substances that can be achieved If in doubt, perform a compatibility with paint. test. Always follow the paint manufacturer’s instructions. When over-painting, take care not to exceed 356° F (180° C) and a baking time of 15 minutes. Outdoor use of Influence of weather conditions Protection ratings Standard IEC 60 529 offers enclosures on the outer coating The enclosure is exposed to the supplementary letter “W”.the option of labeling withextreme weather conditionsIt is necessary to ensure the In order to guarantee satisfactory UV and corrosion resistance during outdoor use. Enclosures labeled this way long-term function of enclosures • UV radiation, the corrosive canopy should be provided to ratings for outdoor weather special color shades).(rain canopy, special paints,gaskets. Often, the protectioninstallation of an enclosure, a rainprotective features or techniqueson the enclosure’s sealingoutdoor installations. For outdoorare equipped with additionalfluctuations place high demandspaint finish is suitable formanufacturer and the user, andhigh winds and temperatureweather. A special 3-phaseconditions agreed between theLong periods of rain, snow, ice,of components exposed to theare suitable for use in weatherprotect the seal againstexposure described in DIN VDEaction of air pollution, rain, ice, in outdoor environments, relevant environmental factors need to be taken into account. These include: snow, wind and other factors in permanent humidity and 0100, part 737, point 5.2, IP X3 is special climate conditions. exposure to prolonged UV insufficient to provide permanent radiation. protection for electrical installations. Condensation inside the enclosure Condensation needs to be prevented with special measures, for example by venting or heating the enclosure. The three-phase coating process for enclosures Coating procedures Technical properties Technical specifications Degreasing, Nano Neutralizes electric resistance, provides temporary coating, rinsing corrosion protection and better adhesion of paint. Coat thickness Approximately 20 μm Uniform coating on all surfaces, edges and recesses Erichsen cupping DIN EN ISO 20 482 > 0.2" (4 mm) Anodic dipcoat priming provides superior corrosion protection. Bucholz hardness DIN EN ISO 2815 > 80 Cross cutting DIN EN ISO 2409 Gt 0 The primer is readily over-painted and free from heavy metals, chromate and silicone. Oven Heating The special merits of powder-coating are high durability, Outer coating thickness 60 μm . . . 110 μm good corrosion protection, good resistance to chemicals, Erichsen cupping DIN EN ISO 20 482 > 0.2" (4 mm) Textured powder-coating temperature, and outdoor environment, and can be Bucholz hardness DIN EN ISO 2815 > 80 easily cleaned. Cross cutting DIN EN ISO 2409 Gt 0 The powder-coating is readily over-painted and is free from heavy metals, chromate and silicone. Oven Heating Overall outer coating thickness Ø 80 μm . . . 135 μm 842 Rittal Catalog 33
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