Zinc Mechanical Galvanizing
Zinc mechanical galvanizing is a barrel process conducted by “cold welding’ (impacting) a powder form of zinc into the surface of steel parts using media (glass beads). The kinetic energy created by the rotation of our barrels, part-on-part contact and media-on-part contact creates a more porous zinc deposit than typical electroplating. This porosity allows hydrogen to relieve naturally within 24-48 hours, meaning there is no need for hydrogen embrittlement relief. With the capability of creating zinc deposits as thick as 0.003”, mechanical galvanizing offers superior corrosion resistance than mere electroplating.
Plateco offers a number of mechanical plating specifications, including ASTM B695 and John Deere (JDM F22) and more.
We understand that this process is not something that can be computer automated. Zinc mechanical galvanizing is an art form. It takes finesse and in-depth planning, which is why our artisans – production operators – are highly experienced and meticulous, expertly controlling the concentration, temperature, time exposure of plating chemicals, speed and angle of our barrels, and many other variables to ensure that your product is plated to your exact specifications. It is a responsibility our artisans yield with truly amazing results.
An Alternative to Hot Dip Galvanizing
Of equal concern is the fact that parts that have been hot dip galvanized will sometimes exhibit severely premature red rust. This could be attributed to “interlayer corrosion” – the corrosion of the iron-zinc layer between the substrate and the galvanized coating. In addition, hot dip galvanizing can exhibit a great deal of thickness variability, which results in some parts lasting a long time while other parts fail prematurely. Neither of these problems exist with mechanical galvanizing.
Other advantages of mechanical galvanizing over hot dip galvanizing include:
No need for hydrogen embrittlement relief
No risk of de-tempering
Better thread fit between fasteners and chasing nuts
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