Dresser-Rand's Engineered Equipment Coatings, EEC-S3 was developed primarily for corrosion protection of airfoils. The coating also provides protection against erosion in select applications. The EEC-S3 is a multi-layer, metallic-ceramic system that provides a galvanic sacrificial base as a second line defensive layer to protect equipment from corrosive attack. The base coating is sealed with a tough corrosion resistant layer to be the first line of protection. This multi-layer combination extends the operating life of unit components and increases online availability. The coating’s smoother surface provides enhanced aerodynamic properties and reduces the tendency of foulants to adhere to the coated components.

Applications
EEC-S3 is designed to be used on industrial compressor and steam turbine blading. The coating provides protection from harsh operating environments in the operating range of 3-9ph.

All coating applications are reviewed by Dresser-Rand for applicability to the design and service conditions of the unit. Components that may be coated include, but are not limited to, the following:

• Axial compressor airfoils
• Turbine blading
• Diaphragms
• Inlet guides
• Guide vanes
• Diffusers
• Discs

Typical Coating Properties

Average Thickness  1-1.5 mils
Surface Roughness <30 Ra (on new surfaces)
Continuous Operating Temp  1000ºF
Peak Operating Temp  1100ºF
Coating Adhesion (ASTM D2247)  Excellent No pickoff
Salt Spray (ASTM B117 & CASS)  No coating failure
Thermal Shock, Impact Survival, Abrasion Resistance  in compliance with Type I Class 4 MIL-C-81751B