Our Roll Plating Process
Tight control for quality results
Industrial use of chromium protects machine parts and equipment susceptible to chemical or mechanical deterioration. In addition, since chromium faithfully follows the contours of the base metal surface and is a good acceptor of uniform finishes, it serves as an excellent non-masking coating for engraved or otherwise contour-treated rolls.
Under most industrial conditions chromium plating will not corrode, degrade or discolor. It is easily cleaned, conducts heat rapidly, and since electroplated chromium is nearly chemically inert, it protects sensitive chemical operations from even minor contamination.
To a large extent, the technical process of plating rolls with hard chromium hasn't changed in decades. However, it takes skill, judgment and knowledge to assure that the chromium is deposited uniformly across each roll and from roll to roll.
The balancing of the temperature of the chromium bath, current density, acidity, placement of anodes and speed of rotation is an art, one that requires knowledge of the characteristics of each roll, the condition of the base metal and the customer's requirements. That's what we do best.
The process begins with a detailed inspection of the bare metal roll. Any pits, nicks, dents or holes are filled and reground (or hand finished) before any plating begins.
The rolls are then immersed in carefully controlled plating tanks that can handle 12' diameter (20' length) and 7' diameter (38' length) rolls. The process is monitored to ensure that the right amount of chromium is being deposited for the finish required for that particular roll.
MPP is one of the few facilities in the country that can handle this wide a size range of rolls and perform all the needed refinishing functions under one roof. We have the capability to plate directly onto stainless steel, nickel, iron of various grades, carbon steel, aluminum and other metal composites.
Our sixty years of experience are your guarantee that there will be no under-lying flaws in the plating to cause problems once the roll is put back into service at your plant.