{"id":8649,"date":"2024-11-12T19:34:40","date_gmt":"2024-11-12T19:34:40","guid":{"rendered":"https:\/\/www.h-metal.ro\/blog\/?p=8649"},"modified":"2024-11-12T19:34:40","modified_gmt":"2024-11-12T19:34:40","slug":"priming-the-metal-surface","status":"publish","type":"post","link":"https:\/\/www.h-metal.ro\/blog\/en\/priming-the-metal-surface\/","title":{"rendered":"Priming of metal surfaces"},"content":{"rendered":"

Priming<\/strong> is the operation by which the first film of material is applied to the metal surface, which is the basis for subsequent coatings.<\/p>\n\n\n\n

The primer film has the role of making a good connection between the metal surface and the next film that overlaps the primer. This primer film can perform several functions: insulating the metal from the environment (through the binder), coloring (through the pigment) and anti-corrosion protection<\/strong>.<\/p>\n\n\n\n

The priming process can be applied both on metal surfaces made of cast iron, steel or stainless<\/a> steel alloys. As well as on non-ferrous metal surfaces (alloys of Cu, Al, Zn, etc.)<\/p>\n\n\n\n

The following question often arises: „Why is it necessary to prime metal surfaces, is painting not enough?”<\/p>\n\n\n\n

The answer to this question is given by the advantages that the primer presents<\/strong>:<\/p>\n\n\n\n

– protects the metal from rust;<\/p>\n\n\n\n

– helps the decorative layers (enamel or glossy paint) to stick better;<\/p>\n\n\n\n

– avoid exfoliation and cracking of the enamel\/paint film;<\/p>\n\n\n\n

– gives the paint film a uniform, smooth appearance.<\/p>\n\n\n\n

Priming of the metal surface – Methods of applying the primer layer:<\/h2>\n\n\n\n

\u2013 with the brush;<\/p>\n\n\n\n

\u2013 by spraying;<\/p>\n\n\n\n

\u2013 by immersion.<\/p>\n\n\n\n

Each method can give good results if it is applied correctly. Immersion is the most efficient and economical method, obtaining a superior surface quality.<\/p>\n\n\n\n

The primer layer can be used both for the protection of new metal surfaces and for the maintenance of previously painted surfaces, as follows:<\/p>\n\n\n\n

– if the metal surface is new: remove the metal oxides, degrease the surface, then apply a layer or two of primer, respecting the drying times recommended by the manufacturer<\/p>\n\n\n\n

– for metallic surfaces that have been painted before: remove the old paint that no longer has adhesion: mechanically or chemically, then follow the same steps as above<\/p>\n\n\n\n

The primer is chosen according to the metal to be covered and according to the nature of the paint. Also of the varnish that is applied over the primer layer.<\/p>\n\n\n\n

Types of primers:<\/h3>\n\n\n\n

– zinc-rich epoxy primer suitable for galvanized surfaces;<\/p>\n\n\n\n

– primer that lends itself to rusty surfaces and is also weldable;<\/p>\n\n\n\n

– quick-drying red, gray and black primers – is an anti-corrosive primer based on synthetic resin.<\/p>\n\n\n\n

It is ideal for anti-corrosion protection of metal surfaces, metal parts, structures.<\/p>\n\n\n\n

Most of the time, primers protect the metal surface against corrosion, but they also help to level the surface and improve the final paint.<\/p>\n\n\n\n

Similar articles:<\/p>\n\n\n\n

Thermal galvanization vs electro-galvanization<\/a><\/p>\n\n\n\n

How do we protect the galvanized sheet<\/a><\/p>\n

\"Share\"\/<\/a>