海洋平台紧固件防腐工艺探讨

为了实现海洋平台紧固件和标准件的长效防腐,解决恶劣环境带来的腐蚀问题,提出了KK1#复合涂层防腐工艺。该工艺采用"电镀锌+Xylan狮隆涂料"复合涂层,利用了Xylan1424水性涂料的干膜自润滑性能和摩擦因数在0.05～0.10之间的特性,具有优越的防盐雾腐蚀性能,极强的抗酸雨性能以及防化学腐蚀性能。相比镀锌涂层,KK1#复合涂层能大幅提高防腐蚀能力,相对于发黑紧固件,减小扭矩高达70%,具有防咬死、防变形功能。防腐涂层测试结果表明,涂有KK1#复合涂层的构件耐盐雾试验2 500 h后,白锈面积33%,红锈面积小于1%,远超出红锈面积不大于15%的要求。

Anti-corrosion Technology for Offshore Drilling Platform Fasteners

To achieve long and effective anti-corrosion of fasteners and standard parts of offshore drilling platforms and to solve the problem of corrosion caused by severe environment,the anti-corrosion technology of the KK1# composite coating was proposed.The technology adopts the composite coating of "electrolytic zinc and Xylan paint".It makes use of the self-lubricating property of the Xylan 1424 water paint dry film and the characteristic of frictional factor between 0.05 and 0.10.It has the advanced anti-salt spray corrosion performance and very strong anti-acid rain performance and anti-chemical corrosion performance.Compared with galvanized coating,KK1# composite coating improves anti-corrosion capacity remarkably.As for black oxide fasteners,the torsion has been reduced by 70%.It has anti-seizure and anti-deformation functions.The test findings of the anti-corrosion coating show that after 2 500 hours of salt spray resistance test,the component with KK1# composite coating has 33% of white rust area and less than 1% of red rust area.The latter goes far beyond and thus desirably satisfies the requirement that red rust area should be less than 15% of the total.