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Construction for Landscape Architecture by Jamie Liversedge, Robert Holden

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Protection of metals

All coatings or protective layers are best applied after the forming and welding of the metals concerned. The main forms of protection are paints; vitreous enamel; plastic, nylon, or metal coating; and galvanizing and cathodic protection.

A typical steelwork paint specification:

  • mild steelwork to be specified as hot-dipped galvanized;
  • remove oil and grease by wiping with a T Wash or mordant solution (a weak phosphoric acid solution), and then rinsing in clean water;
  • prime with one coat of epoxy zinc phosphate primer;
  • two-coat finish: first a high-build epoxy resin, then a final coat of enamel paint.

Plastic and nylon coating In this process, the metal is dipped in or sprayed with nylon (a synthetic polymer), or an electrically ...

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