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Tel: (+36) 46/519-100
Fax: (+36) 46/519-155, 519-115


E-mail: contact@drotaru.hu
Products
> Introduction
> Production
Prestressing wire
Prestressing strand
Steel wire fibre
> Technical parameters
> Application

Production

 

Surface-preparation

The raw material of our products is (stelmor) rolled wire of high carbon content cooled by a regulated process, with a pack weight of 1350-2500 kg depending on the specific product.

The first step of the processing is surface preparation, which is performed in a plant equipped with fully automatic equipment without any human intervention. The scale on the surface of the rolled wire is removed by hydrochloric acid steeping. Subsequent to that the rolled wire with a clean metal surface will acquire the layers that are indispensable for the process of wire-drawing through phosphate and borax baths.

The concentration and the temperature of the baths are monitored on a daily basis to provide optimal conditions for the formation of the layers.