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Anticorrosion Technology for High Temperature Coatings

Request Number

NG_2017_0009_N_050
Point of Contact
Description

High temperature coatings must withstand a minimum sustained temperature of 150˚C, with additional operating temperature requirements reaching 300˚C, 500˚C, up to 650˚C. The coating is permanently resistant to temperatures in the specified ranges and must also withstand periodic thermal cycling down to ambient or cryogenic temperatures.

In addition to the specified operating temperature range for the coating, the flexibility, adhesion, solvent and chemical resistance for coatings used in petrochemical, chemical processing, oil & gas, pipeline, power generation, OEM, pulp & paper, and materials processing each have slightly different requirements.

ICL Innovation seeks technology to improve the anticorrosion performance of our coatings.

NineSigma hosted a webinar for ICL Innovation on this topic on April 6, 2016 at 10am Eastern. To access a recording of the webinar, click here. A PDF transcript of the webinar can be found at the bottom of this page.

Background

High temperature coatings are produced using a limited range of chemistries. The resin systems which are most widely used are:

  • one part pure silicones (not silicone modified)
  • silicone ceramic coatings
  • epoxies:
    • fusion bonded epoxies (FBE)
    • high solids epoxies.

Coatings developed using these resin types are mainly spray applied prior to installation while field applied coatings can be spray or brush applied. In either circumstance, the pipe itself is coated in a layer of primer. High temperature coatings  are typically not the outermost layer, as shown below. Additional layers of insulating material ② and an external covering ③ often trap moisture between the layers leading to Corrosion Under Insulation (CUI). Since this moisture is unable to escape, prolonged contact with the steel substrate accelerates corrosion. Whether it enters through cracks or holes in the insulation, this trapped moisture has the potential to cause rapid rusting and corrosion of the pipe. Monitoring for CUI is exceedingly difficult and there is a need for longer lasting corrosion protection at elevated temperatures. Due to the extreme temperatures and the periodic thermal cycling, it is typical that one or more existing types of corrosion inhibitors are used.

Key success Criteria

The success technology will be:

  • Stable to thermal cycling:
    • does not degrade overtime
    • does not lose efficacy
    • does not become unstable in the paint
  • Provide corrosion resistance in the primer layer applied at 15-25 micron film thickness over cold rolled steel panels
  • Compatible with various high temperature resins such as silicone, silicone epoxy, etc.
  • Preferably below 15 microns in top particle size (D100)
  • Easily be dispersed into the coating formulation
  • Achieve > 500 hours in salt spray after thermal excursions from room temperature to 600˚C without loss of adhesion
Possible Approaches

Possible approaches included (but are not limited to):

  • High temperature phosphates or polyphosphates
  • Combination of phosphates and other refractory elements which provide corrosion resistance
  • Stabilized nano-dispersions (aqueous and non-aqueous)
  • Ceramics
Approaches not of Interest

The following approaches are not of interest:

  • Usage of heavy metals (such as Cr, Pb, Cd, Hg, As, Sb, Zn) which are under restrictions or require hazardous labeling of the paints
  • Volatile organic compounds which could sublimate when exposed to the operating temperatures of the coating
Due Date
Dec 30, 2016
Items to be submitted

ICL Innovation welcomes responses from academic, research institutions, or other organizations who are interested in developing innovative technologies and sharing intellectual property in licensing. Approaches with demonstrated feasibility are preferred, but early stage approaches with sound scientific concepts are also welcome. Technologies aligned with business interest will enjoy full funding until implemented on an industrial scale.

We are looking for concise non-confidential proposals, statements of expertise, and other inquiries if your expertise fits our needs. To respond, please use the Respond button located at the bottom of the page.

Client Point of Contact

Super User
Gallery Moderator(s)
Kevin Andrews
Request Number
NG_2017_0009_N_050
Preferred Collaboration Types
Area of Interest