PPG Industries’ industrial coatings business will highlight new products at the North American International Auto Show (NAIAS) in Detroit. The products are designed to help global automakers fight metal corrosion and meet increasingly stringent environmental standards. The products include:

  • Powercron AdvantEdge and Powercron EPIC e-coat systems that are made with a catalyst that functions without tin, bismuth or other heavy-metal compounds. PPG says this represents a "significant environmental advance" in corrosion-fighting products for the auto industry. The technology enables PPG’s coatings to cure at temperatures as low as 320 F to reduce energy consumption and related carbon emissions.
  • PPG also is showcasing a duplex coating system that incorporates an “engineered” zinc-rich primer between the metal substrate and e-coat finish. The company says the primer and e-coat "significantly improve" the corrosion resistance of high-end underbody parts, subframe finishes and other vulnerable parts on trucks and passenger vehicles. The zinc-rich primer works with PPG coatings to provide protection through the use of a sacrificial zinc-oxide layer that corrodes when the barrier coat is chipped by road debris, enabling it to reseal and protect itself. PPG says the system can function as an economical alternative to galvanizing and plating in some applications. The coating is showing "exceptional" corrosion resistance on control arms, tie rods, steering knuckles and other components that are critical to the safety, durability and performance of trucks and automobiles, the company says. The technology also may enable auto manufacturers and their suppliers to cut costs by using thinner-gauge metal for parts; by enhancing corrosion resistance on welds, seams and cut edges; and by minimizing masking requirements for complex parts.
  • PPG's near-neutral pH pickle/descaler, called Metal Conditioner 257, is designed to remove weld scale and light oxides from steel surfaces. The product is for use in mixed-metal pretreatment systems where it preconditions welds and heat-affected zones prior to phosphating without significantly affecting white metals, galvanized steel and aluminum surfaces. PPG says this enables them to be processed at the same time as steel. As a mildly acidic pickle/descaler, AMC257 may be more sustainable than conventional mineral-acid pickle solutions because it is non-fuming and operationally easier and safer to use.
  • In response to the increased use of aluminum in trucks and passenger vehicles, PPG says it has developed the Versabond pretreatment system, which uses zinc-phosphate hypernucleation technology to accelerate crystal formation and reduce the production of sludge by up to 50% in some pretreatment systems. PPG says the pretreatment system also can result in 10-20% lower processing temperatures and corrosion resistance and adhesion due to its ability to deposit small, densely packed zinc-phosphate crystals.

The North American International Auto Show takes place Jan. 12-25 at Cobo Center in Detroit.

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