Surface engineering is a hot topic these days, with applications throughout a wide range of industrial sectors. Engineering surface treatments and coatings can bring specialist properties of corrosion and wear resistance, without compromising the characteristics of the substrate or base metal. Many new processes are emerging, their innovations and developments sometimes outpacing any proven industrial demand or performance demonstration. ACT’s tradition of high quality is backed up by testing of RoHS compliant as per our specifications.
What are the advantages of MTP?
IT HAS A HIGH HARDNESS
900-1200Hv, harder than most industrial abrasives and steel counter faces. Unusually, it combines this hardness with a degree of toughness, so the deposit can stand up to high stress contact.
IT IS CORROSION AND WEAR RESISTANCE
Less wear than given by through-hardened, induction hardened, carburized or nitride steels in dry sliding situations.
IT HAS AN ATTRACTIVE AND BRIGHT FINISHING
It responds very well to grinding and polishing, providing ideal surfaces for dealing with delicate products such as paper and textiles, for giving low friction and for high precision parts.
IT HAS A VERY LOW FRICTION
Against carbons, polymers and graphite. This makes it ideal for textile applications or for seal faces, as well as for components like vane pumps. It is the perfect counter face for other polymers which rely on establishing a transfer-film for their best performance.
IT CAN BE APPLIED TO A WIDE RANGE OF GEOMETRY
Chrome plating can be applied evenly to flat surfaces, to fine bores, even with large aspect ratios, to cylindrical like shafts or rollers, and to holes and close tolerance areas with careful attention to anode design and fixturing.
THE DEPOSITION TEMPERATURE IS LOW
And with de-embrittlement treatment has little effect on substrate properties. Provided that high strength steels are stress-relieved before plating and heat-treated again afterwards (generally for 2 to 3 hours at about 220°C), there will be very little hydrogen embrittlement.
IT GIVES SUPERB SUBSTRATE ADHESION
Before plating, substrates are subjected to rigorous cleaning, so that the surface to be coated is completely free from contaminates. But the ultimate adhesion is achieved in the plating bath itself, with an initial reverse voltage etch which removes any residual surface contamination.
IT CAN BE APPLIED TO A WIDE VARIETY OF SUBSTRATES
Covering a wide range of engineering or high alloyed steels, cast irons and stainless steels, copper alloys, brasses and bronzes, nickel-based alloys and lightweight aluminum alloys.
THE PLATING IS STABLE AND HAS A EXCELLENT THERMAL CONDUCTIVITY
It is suitable for most organic acids and gasses (not chlorine), excellent in hot oxidizing or reducing air, in commodities like coal gas, fruit acids, beer, sugar, brine, molten glass, glue, milk, fuels and oils.
IT PROVIDES SUPERB ABRASION RESISTANCE
Even under high contact stress. It gives a very low wear rate with abrasive products like paper and textiles. With thick deposits, it gives excellent wear resistance under high stress contact against glass fibers, sand, coal, cement, limestone, etc. With abrasion being the most common and destructive wear process found in industry, MTP has the potential to solve many problems in bearings, pumps, valves, etc. throughout a wide range of industries; including semiconductor, aerospace, pharmaceutical, chemical, oil and gas, textiles, printing, food, mining, and others.