Surface refinement

Hot dip galvanising

MEISER grating manufactured from mild steel is usually hot dip galvanised. In our new plant, which we put into operation in 2011, this is carried out in accordance with the specifications of DIN EN ISO 1461. State-of-the-art galvanising and environmental technology guarantee long-term corrosion protection which is able to withstand the usual mechanical and chemical stresses without problems.

Powder coating

If you would like to have your grating supplied in various colours, powder coating is the least expensive and most durable solution. In this process the grating is initially degreased in immersion baths, pickled and zinc-phosphated. Then the powder coating material is applied electrostatically and baked at approximately 180° C.

Particularly durable corrosion protection is offered by the MEISER DUPLEX coating, which consists of hot dip galvanising with subsequent powder coating. The powder coating is available in all possible RAL colours in various degrees of gloss and surface structures. Moreover, we are able to provide the necessary layer thicknesses for all feasible applications from C1 to C5-M.

Pickling (high-grade steel)

MEISER high-grade steel grating is usually pickled after production, as during manufacture the welding process results in scale and discolouration, which in turn represent potential points of attack for corrosion. In the pickling process the grating is immersed in a pickling bath, as a result of which they are provided with a metallically pure and protected surface.

Electro-chemical-polishing (high-grade steel)

The electropolishing process represents a reversal of the electroplating process. Under the influence of direct current, metal is removed in an electrolyte from the anodic surface of the workpiece. The result is smooth and shiny surfaces which display a high level of corrosion resistance and is very easy to clean.

Glass bead blasting

Through the use of glass beads as blasting material, MEISER grating made of chrome steel and aluminium are further refined. Blasting techniques serve to specifically create matt or semi-gloss surfaces and to cover surface defects in the material. The resulting semi-gloss effect is permanently retained. The surface is cleaned of adhesive foreign particles and also strengthened, as a result of which its durability may be prolonged.

Anodising (aluminium)

MEISER grating made of aluminium is anodised as standard in order to prevent oxidation. In the anodising process, which as a rule is carried out in an immersion bath, the material is initially degreased and pickled before the actual anodising process is performed. Here, the chemical process of electrolysis is used, with an oxidised protective layer being created on the aluminium. This can be coloured if the natural aluminium colour is not desired.

Cathodic immersion bath coating (CDC)

CDC is a good combination of corrosion protection, quality, cost-effective and environmental friendly. Corrosion protection that offers good resistance to mechanical and chemical stress.  The underlying physical principle in electro-coating consists in attracting materials with opposite charges and producing very good adhesion as a result.

Before the coating process a direct current is applied to the workpiece, which is subsequently immersed in a coating bath with oppositely charged coating particles. In order to achieve maximum resistance of the coating, the film subsequently hardens at approximately 180° Celsius in the baking oven. Various layer thicknesses are possible, although the colour selection is limited.