. Construction materials for coastal structures. Coastal engineering; Building materials. o o o. -EPOXY PHENOLIC o o o o o â EPOXY Figure 94. Cross-linked epoxy phenolic. The disadvantages of epoxy phenolics, as compared to epoxies are: (a) Increased brittleness of coating; (b) lack of toughness and thus more subject to damage upon impact (cracking, shattering, delamination); (c) requirement for heat in curing (not true with all epoxy phenolics); (d) lack of availability in high build formulations; and (e) slightly more difficult to repair and topcoat due to adhesion problems {see paragraph (8
. Construction materials for coastal structures. Coastal engineering; Building materials. o o o. -EPOXY PHENOLIC o o o o o â EPOXY Figure 94. Cross-linked epoxy phenolic. The disadvantages of epoxy phenolics, as compared to epoxies are: (a) Increased brittleness of coating; (b) lack of toughness and thus more subject to damage upon impact (cracking, shattering, delamination); (c) requirement for heat in curing (not true with all epoxy phenolics); (d) lack of availability in high build formulations; and (e) slightly more difficult to repair and topcoat due to adhesion problems {see paragraph (8)}. (10) Phenolics. Phenolic coatings include baking phenolics of the alcohol soluble type and phenolics of the oil soluble type in combination with drying oils. The baking phenolics have excellent resistance to corrosive chemicals, acids and caustics. They require baking for curing (cross linking). The baking phenolics form tightly cross-linked coating films with exceptionally high corrosion resistance, which is higher than the epoxy-phenolics. Because of their tight cross linking they are brittle and subject to damage and delamination if subject to impact. These materials are used as linings for tanks, barges, and piping. The phenolic coatings designed for atmospheric service are made from phenolic resin combinations and drying oils. These, at one time, were considered the best air-drying coatings for water resistance and weak chemical resistance; they were used extensively as marine maintenance coatings. They are still considered superior, to most alkyd coatings in 330. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Moffatt & Nichol, Engineers; Coastal Engineering Research Center (U. S. ). Fort Belvoir, Va. : The Center
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