大口径热煨弯管三层PE防腐涂层技术研究.pdfVIP

22 6 Vol.22 No.6 2010 11 CORROSION SCIENCE AND PROTECTION TECHNOLOGY Nov. 2010 PE ℄ , 730060 : PE , , , ℄, ,  PE . PE . : ; ; PE; : TE985.8 : A : 1002–6495(2010)06–0543–04 Three-layered Polyethylene Anti-corrosion Coating for Large Diameter Bend Pipe QIAO Jun-ping Tianhua Research Designing Institute of Chemical Machinery Automation, Lanzhou 730060 Abstract: In this paper, a new technology is introduced, which is adopted to produce the so- called three layered polyethylene anti-corrosion coatings for large diameter bend pipe, which consists of that firstly an epoxy powder coating electrostatically sprayed on a pre-heated bend pipe, and secondly by means of a special winding machine the heated bend pipe is closely wrapped by a cold middle adhesive tape and successively a top polyethylene tape, and then by heat released from the fusion process of epoxy powders of pre-heated bent pipe the middle adhesive belt is melt on the surface of the epoxy pre-coated bend pipe, therewith the three layered polyethylene anti-corrosion coating is finally produced. This innovative technology can realize the application of three layered polyethylene anti-corrosion coatings for large diameter bent pipes. Key words: bend pipes anti-corrosion coating; winding machine; 3PE; cold adhesive belt hot-melt , , . , PE : Æ. , , . : ( FBE) ( FBE) [1]; : Æ ℄ ()℄ () . PE ( 1)  : 2009–03–30 ; 2009–06–10 : (1970-), , , , Fig.1 Sketch of 3 layered PE coating structure 1-steel