Palmer Offers Brochure On Cavitation-Reducing Polymer Coatings

Palmer Internationl, Inc., Worcester, Pa., has developed two elastomeric compounds, DuraTough DP and DuraTough DL, for the repair of marine components damaged by cavitation. These compliant compounds are designed to inhibit the deterioration of metal substrates caused by cavitation and low percentages of entrained solids (silt and sand) in high volume and high velocity fluid flow environments.

Both materials are cold-applied over a grit blasted surface treated with a corrosion-inhibiting primer.

DuraTough SP is mixed to a firm paste and is used for filling areas deeply pitted by cavitation, and can be applied to vertical or horizontal overhead surfaces up to 1-1/2 inches thick without slumping. DuraTough DL is a high viscosity, brushable topcoat, applied to protect metals from damage caused by cavitation and entrained solids' erosion.

Tests conducted by the B.C. Hydro Research & Development Laboratory, Surrey, British Columbia, show that DuraTough resists cavitation erosion five times better than carbon steel and two time better than 308L stainless weld overlay.

(Figures obtained from ASTM G 32 Vibratory Cavitation Test methods for low intensity cavitation.) According to Palmer International, repairing cavitation-damaged marine components (rudders, struts, screws, bearing "barrels," circ pumps, sea chests, Kort nozzles) with DuraTough is extremely cost-effective.

For more information and free literature on Palmer polymer coatings, C i r c l e 6 0 on R e a d e r S e r v i c e C a rd

Maritime Reporter Magazine, page 8, Mar 1989

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First published in 1881 Maritime Reporter is the world's largest audited circulation publication serving the global maritime industry.