Treating the Surface of Lightweight Metal Alloys using Electrically Conducting Corrosion Resistant Coatings

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Key Features and Benefits of NANOMYTE PT-60C
About NEI Corporation


NEI Corporation offers NANOMYTE line of pretreatments, primers, and topcoats, which are an advanced drop-in solution for metal finishing applications. Whether for maintaining structural integrity or for preserving aesthetic appearance, these formulations can be easily applied to metal substrates by brush, wipe, spray or immersion. One such pretreatment formulation offered by NEI is NANOMYTE PT-60C, which is an electrically conducting conversion coating.


NANOMYTE PT-60C is specially engineered for treating the surface of lightweight metal alloys utilized in the electronics industry. Besides offering both bulk and surface electrical conductivity simultaneously, PT-60C exhibits outstanding corrosion protection by overwhelming the galvanic corrosion induced by the electrical conductivity of the coating, thanks to its unique ‘self-healing’ nature. The waterborne coating solution is chromate-free and is created by immersing parts in the coating solution.

Electrical circuits consist of lightweight metal components protected by corrosion resistant coatings, which experience damage over time because of contact and spring impact. The damaged areas are the potential sites of general and galvanic corrosion. It is necessary to inhibit corrosion in the contact areas to retain electrical conductivity in grounding and electromagnetic interference (EMI) shielding. PT-60C delivers the required corrosion protection. With improved performance PT-60C is an easy-to-use alternative solution to currently used coatings, which either do not have adequate conductivity or do not deliver adequate corrosion protection.

Key Features and Benefits of NANOMYTE PT-60C

The following are the key features of NANOMYTE PT-60C:

  • Non-metallic coating
  • Single component, waterborne solution
  • Compatible with primers and paints
  • Ambient temperature bath preparation

The following are the key benefits of NANOMYTE PT-60C:

  • Provides both electrical conductivity and corrosion resistance
  • Eliminates chromate from the coating process
  • Standalone treatment specifically formulated for the electronics industry
  • Versatile self-repairing technology to counter impact damage

The corrosion protection and electrical conductivity characteristics of NANOMYTE PT-60C are evaluated, as shown in Figures 1 and 2. Figure 1 shows salt-fog exposure experiments (ASTM B117), where PT-60C-coated 4” X 6” magnesium AZ91D panels exhibit minimal signs of general and galvanic corrosion after exposure when compared to AZ91D panels with traditional treatments (Electroless Nickel and Stannate immersion process). Figure 2 illustrates surface resistivity measurements by means of the four point probe technique. The surface conductivity measured was in the range of 0.25 – 2.5S/m.

Figure 1. Salt-fog exposure experiment results

Figure 2. Surface resistivity measurements using the four point probe technique

NEI offers PT-60C in 1, 5, and 55 gallon quantities.

About NEI Corporation

NEI Corporation is an application driven company that utilizes nanotechnology to develop and produce advanced materials. The company’s core competencies are in synthesizing nanoscale materials and prototyping products that incorporate the advanced materials. Founded in 1997, we manufacture and sell advanced materials products, provide materials development services, and perform contract-based R&D for public and private entities. NEI has built a strong manufacturing and R&D infrastructure that enables rapid transition of concepts to products.

NEI’s products are sold under the registered trademark: NANOMYTE®

This information has been sourced, reviewed and adapted from materials provided by NEI Corporation.

For more information on this source, please visit NEI Corporation.

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