建筑輸水用小于DN100熱鍍鋅鋼管內(nèi)涂塑技術

Inner Surface Plastic Coating Technique for Hot-galvanizedSteel Pipe under DN100 for Building Water-supply Service

摘要: 分析了DN100以下熱鍍鋅給水鋼管熱鍍鋅層與LLDPE涂層粘結力差的原因,比較了熱鍍鋅鋼管內(nèi)壁預處理兩種方法的優(yōu)缺點。采用特殊磷化工藝處理,內(nèi)涂LLDPE塑膜,解決了熱鍍鋅層涂LLDPE塑膜附著力差的技術難題。指出熱鍍鋅鋼管生產(chǎn)企業(yè),只需少量投資,即可生產(chǎn)高層防震建筑用高效、衛(wèi)生的給水管。

Abstract: Analyzed is the cause for the unsatisfactory bonding of the LLDPE coating with the inner galvanized surface of the hot-galvanized steel pipes under DN100. The respective advantages and disadvantages of the two pre-coating treatment processes for the inner surface of the said pipes are compared, based on which result, the said chronic technical problem concerning the LLDPE bonding is fixed by means of special phosphorization of the pipe prior to the plastic coating. It is concluded that thanks to the said solution, only small investment needs for hot-galvanized steel tube makers to produce hi-efficiency and health-friendly water pipes for antiearth quake high-rise buildings.