Info
Chroming
Chrome is a metal of silvery color with bluish shade. In the atmosphere of air chrome changes it's colors. It is immune to organic acids; nitric acid and hydrogen sulfide also does not affect it. Only hot sulphur acid and hydrochloric acid (even in environment temperature) dissolve the chrome layer. The hardness of chrome layers created in proper conditions is greater than hardness of the hardest grades of hardened steel. Chrome layers can be divided into decorative and technical, depending on their purpose. Decorative chrome layers are usually laid on a sub-layer of copper and nickel, or nickel, and not directly on steel, because in galvanic cells, which are created in open spaces (leaks), ferrum in relation to chrome is an anode. The technologies of laying on thin layers of chrome (about 1 µm) on a sub-layer of copper-nickel are commonly used, for instance in covering the decorative-protective car parts, motorcycle parts, bicycle parts, in the industry of railway and trolley cars building, in building measurement devices (especially for chemical laboratories) and precision devices (i.e. watches).
Chrome layers' implementation.
Technical chroming is widely implemented. For this reason thicker layers of chrome are laid on, on average 0.005 - 0.2 mm, and in some special cases even up to 1 mm, directly on steel for bettering mechanical properties and corrosion immunity of chromed parts. And so, for instance, great results can be achieved by chroming matrixes and press tools, especially for creating items made of rubber, plastic and leather. A great advantage in this case is the smoothness, chemical resistance and insignificant friction coefficient of chrome layers, which along with high hardness affects high form durability and beautiful looks of manufactured parts. In order to protect scratching surfaces against mechanical damage, technical chroming is widely implemented in machine building, aviation and transport. Internal-combustion engines' cylinders are chromed with good results, piston rods, hydraulic lifts' rods etc. Technical chroming is widely used in tool industry. New tools, especially made for metal and nonferrous metals and soft metals working, are chromed to thickness not much greater than tool's wear tolerance. Another property of a chromed layer, the tendency to weak adherence, is also advantageous. It decreases to minimum sticking any chips to working surfaces of tools. Chroming in the production of gauges, as it increases manifold their durability in this way. Decorative-protective chroming is also widely implemented in practice. A thin chromed layer laid on a shiny nickel layer, remaining unchangeable in normal atmospheric conditions, keeps an esthetic looks of a chromed object for many years. What is more, the great hardness of a chromed layer protects the object against any mechanical scratches.
ABOUT THE COMPANY
CHROMTECH Company was established in 1989 in the craft of high-quality technical chrome layers.
The partners have brought to the company wide-ranging, engineer experience and knowledge connected with electrolysis, metal sedimentation processes, galvanized layers and in particular chrome layers. Technical chroming facility is located in Zwięczyca, 3 km from Rzeszów, near the Rzeszów-Krosno route. We complete quickly, efficiently and honestly even the most atypical customer orders in the filed of technical chrome layers.
During last years we have extended our offer with chrome layers of increased hardness (800-1100HV).
All the effort in perfecting the company is to provide customer's satisfaction with well done work, and customer's satisfaction is an overriding goal for us.
OFFER
1. Technical chroming of normal (400-500HV) and increased hardness (800-1100HV) of steel parts:
- matrixes, press tools, shafts, rods, piston rings, piston rods etc. (examples in Gallery)
2. Chrome layer from 0.0005-0.2 mm, and in special cases even 1 mm
Electrolysis processes are done in sulphate baths and modified sulphate of increased hardness
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