{"id":6762,"date":"2026-03-30T12:11:49","date_gmt":"2026-03-30T09:11:49","guid":{"rendered":"https:\/\/axinar.com\/blog\/ilektrostatiki-vafi-ti-einai-pleonektimata-efarmoges"},"modified":"2026-03-30T12:34:52","modified_gmt":"2026-03-30T09:34:52","slug":"electrostatic-painting-of-metals","status":"publish","type":"post","link":"https:\/\/axinar.com\/en\/blog\/electrostatic-painting-of-metals","title":{"rendered":"Electrostatic Painting of Metals"},"content":{"rendered":"\t\t
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Electrostatic metal painting<\/strong> (powder coating) is the most widely used industrial metal finishing method worldwide. Instead of wet paint and solvents, it uses dry powder that adheres to metal through an electrostatic charge and is then cured in an oven, creating a coating that far surpasses traditional paints in durability, uniformity and service life.<\/p>\r\n\r\n

At Axinar<\/strong>, electrostatic painting is carried out with an automated GEMA<\/strong> system on a 120-metre production line, capable of coating parts up to 6.5 metres<\/strong> in length. Our facility is located in Thessaloniki, Greece<\/strong> and operates under ISO 9001:2015<\/strong> and ISO 14001:2015<\/strong> certifications.<\/p>\r\n\r\n

How electrostatic painting works<\/h2>\r\n\r\n

The principle is simple but effective: an electrostatic gun negatively charges the powder particles, which are attracted to and adhere uniformly to the grounded metal surface. The part then enters a polymerisation oven at 180\u2013200\u00b0C<\/strong> for 15\u201320 minutes, where the powder melts, flows and hardens into a solid film with a thickness of 60\u2013120 \u03bcm<\/strong>.<\/p>\r\n\r\n

The result is a surface free of drips, bubbles or inconsistencies, something wet painting cannot guarantee with the same consistency.<\/p>\r\n\r\n

The 4 stages of the process<\/h2>\r\n\r\n

1. Sandblasting & chemical pre-treatment<\/h3>\r\n

The metal is cleaned of oxides, oils and impurities. Sandblasting creates micro-roughness for better adhesion, while phosphating (or zirconiation for aluminium) forms a protective layer against corrosion. Without proper pre-treatment, even the best coating will fail.<\/p>\r\n\r\n

2. Powder application<\/h3>\r\n

The automated GEMA system applies the powder with precision, ensuring uniform thickness across the entire surface, even on complex geometries, corners and recesses. Powder that does not adhere is recycled and reused.<\/p>\r\n\r\n

3. Oven curing<\/h3>\r\n

The polymerisation oven transforms the powder into a continuous, hard film. Temperature and time are automatically controlled per powder type, polyester, epoxy or hybrid, for optimal results.<\/p>\r\n\r\n

4. Cooling & quality control<\/h3>\r\n

After curing, parts are gradually cooled. Every batch is checked with a film thickness gauge and visual inspection before delivery to the customer.<\/p>\r\n\r\n

Why electrostatic painting outperforms wet painting<\/h2>\r\n\r\n\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n
Feature<\/th>\r\n Electrostatic (Powder Coating)<\/th>\r\n Wet paint<\/th>\r\n <\/tr>\r\n <\/thead>\r\n
Coating thickness<\/td>\r\n 60\u2013120 \u03bcm in a single pass<\/strong><\/td>\r\n 20\u201340 \u03bcm (requires multiple coats)<\/td>\r\n <\/tr>\r\n
Corrosion resistance<\/td>\r\n 15\u201325+ years<\/strong><\/td>\r\n 5\u201310 years<\/td>\r\n <\/tr>\r\n
VOC emissions<\/td>\r\n Zero<\/strong><\/td>\r\n High (solvents)<\/td>\r\n <\/tr>\r\n
Material efficiency<\/td>\r\n 95\u201398%<\/strong> (powder recycling)<\/td>\r\n 40\u201360% (overspray waste)<\/td>\r\n <\/tr>\r\n
UV resistance<\/td>\r\n Excellent<\/strong> (polyester powder)<\/td>\r\n Moderate (yellowing over time)<\/td>\r\n <\/tr>\r\n
Drips \/ bubbles<\/td>\r\n None<\/strong><\/td>\r\n Common issue<\/td>\r\n <\/tr>\r\n <\/tbody>\r\n<\/table>\r\n\r\n

Textures & finishes<\/h2>\r\n\r\n

Electrostatic painting is not limited to smooth surfaces. At Axinar we offer:<\/p>\r\n\r\n