钢管砼拱桥钢拱肋热喷涂长效防腐技术

Lasting Antiseptic Technology of Thermal Spraying Coating for Steel Arch Rib of Steel-pipe Concrete Arch Bridge

钢管砼拱桥建成后,作为主要承重结构的钢拱肋,长期暴露在空气中,防腐问题是一个长期突出问题,因此对钢管表面的防护显得尤为重要。针对喷涂铝及铝合金防腐机理,介绍钢拱肋外表面所采用的热喷涂铝及铝合金长效防腐、施工注意事项和施工技术。

As a major load-bearing structure, the steel arch rib will expose to the air when the steel-pipe concrete arch bridge is finished. Then antiseptic treatment becomes a long outstanding problem, therefore the protection to the steel-pipe surface seems to be of great significance. In light of the antiseptic mechanism of aluminum-spraying coating and aluminum alloy, this paper briefs the lasting antiseptic and construction technologies as well as points for attention in construction for the aluminum-thermal spraying coating and aluminum alloy applied to the surface of steel arch rib.