Coating System with 'Black' Appearance Meets Temperature Requirements

Surface finish with optimized corrosion resistance developed specifically for fasteners in the automotive industry with particular focus on visible areas.

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Dörken MKS-Systeme GmbH & Co. KG, parent company of Dörken Corporation USA, introduces a coating system that provides fasteners with high performance and black corrosion protection. The coating, an addition to the black coatings of the Delta-MKS product series, consists of the matt zinc flake basecoat Delta-Protekt KL 120 and the water-based black topcoats Delta-protekt VH 321 GZ and VH 322 GZ.

These coatings provide effective reduction of white corrosion, suitable adhesion and resistance to abrasion while meeting the respective coefficients of friction, the company says. The system was developed specifically for screws and other fasteners for use in the automotive industry.

With an overall thickness layer of 18 microns (depending on the structure of the layer and geometry of the parts), corrosion durability of 840 hours as per DIN EN ISO 9227 is achieved. White rust resistance of 240 hours is significantly exceeded. According to the company, the basecoat guarantees active cathodic protection while the topcoat ensures high chemical resistance and satisfies temperature resistance requirements.

The system can be applied using all standard methods, such as dip, dip spin or spray. The choice of procedure depends on the size and geometry of the parts.

The new matt basecoat is also compatible with other top coats of the Delta-Protekt and Delta-Seal product range.