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Hard chronium plating: Production
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With ample capacities (diameter 1.2 m, length 6 m), large parts are our speciality, with or without grinding, whatever the surface finish required: steel metallurgy (on the left) with Ra 3.2 shot blasting; plastics technology (centre), mirror polished; press piston (Ra 0.1).
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Continuous-cast bar or tube ingot moulds: due to its resistance to high temperatures, the chrome protects the copper bore from the abrasion of the pouring of the molten steel.
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Thanks to controlled anodising technology, complex-shaped parts can be protected by a hard chromium plating, as seen here on a mould or an extrusion blow-moulding die.
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Using a combination of our technologies, this compressor rotor was nickel plated (full) and then chromium plated (bearing surface).
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Oil valve cylinders chromium plated in the bore, here in series production.
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The textile industry uses a lot of both hard chromium and nickel plating: yarn is a fearsome abrasive and the enzymes, notorious oxidisers. This is a yarn guide on a weaving loom that was nickel plated and then chromium plated.
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A typical example of optimisation of friction and wear protection: hard chromium plating of gear teeth on marine converters.
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The marine industry again: hard chromium plating of connecting rod surfaces or surfaces of crankshafts for diesel engines. Here, we see a 6-cylinder, 5 m long shaft.
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Yet another nice piece of work: thick hard chromium plating and then grinding of various surfaces on a 6 m long pyramidal shaft (on an expanding chuck in steel metallurgy).
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Chemical checks on our baths and analysis of discharge water are carried out internally.
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Hardness checks by Leitz micro-durometer.
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Multi-criteria roughness checks using cutting-edge recording apparatus.
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Various microscopic inspections...
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