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The Feasibility Of Plastic - Coated Steel Pipe In Real Life
- Dec 15, 2016 -

1. Surface treatment

The surface treatment improves the adhesion of the coating to the tube and the durability of the coating. Surface treatment generally can be divided into two categories, one is mechanical treatment, including sand blasting, sanding, brushing steel brush, brush, etc., mainly to remove the pipe burr, rust, angular, etc .; the other is the chemical treatment , Including detergent degreasing, alkali degreasing, phosphate treatment, acid rust, chemical oxidation treatment for the removal of the surface of the oil pipe and rust. After the treatment with compressed air to blow the pipe surface clean, if necessary, use water to clean and dry.

2. Preheat

Before spraying, the treated tubes are fed into a baking oven and heated at a temperature of about 200 ° C. The heated tube surface melts the epoxy powder coating applied to its surface, resulting in a homogeneous coating film.