Letter 16061

Dielectric coating for stainless steel [California] 

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We need a good electric insulating (dielectric) coating on a stainless steel sheet metal part (304 alloy). The insulation is needed for ESD compliance; I don't have hard numbers on the breakdown voltage needed, but any dielectric strength will help. This surface should preferably be flat black, though other options could be considered. Low cost is, of course, very important.

Is a polyester powder coat a good choice? I figure it should be, since polyester sheet has a high dielectric value. Anything else I would do well to look into?

Thanks,

Wallace White
- Santa Clara, CA, USA

Will the coating be subject to wear of any kind? What kind of atmosphere, application is the part for?

Tom Pullizzi Platronica.com Falls Township, PA

The polyester resins used in the system of powder coating have a good dielectric strength specially after the curing with TGIC (TRIGLYCIDYL ISOCYANURATE)10MIN/200C.
Most polymer have a good dielectric strength , direct current voltage at which the dielectric break down occurs, (100-300kv/cm).

Ahmed Fouad Serag Eldin Ein Shams - Cairo - Egypt

Ed. note, July 2007: Mr. Ahmed Fouad Serag is presently seeking a new career opportunity. His masters thesis has been accepted for publication in the European Polymer Journal. This thesis is considered to be the first in the Middle East in the powder coating field to be published in an international journal: Effect of curing on the broadband dielectric spectroscopy of powder coating; Samy A. Madbouly, Ahmed F. Serag Eldin and Ashraf A. Mansour You may reach Mr. Serag at a_fouad01@yahoo.com or mobile no. 002 0102164216

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