金刚石粒径对钻具表面镍铜超疏水镀层性能的影响  

Impacts of diamond particle sizes on performance of Ni-Cu superhydrophobic coatings on drilling tool surfaces

作　　者：闻棋 李涛[1] 段隆臣[1,2] 潘秉锁 WEN Qi;LI Tao;DUAN Longchen;PAN Bingsuo(Faculty of Engineering,China University of Geosciences,Wuhan 430074,China;National Center for International Research on Deep Earth Drilling and Resource Development,Wuhan 430074,China)

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074 [2]地球深部钻探与深地资源开发国际联合研究中心,湖北武汉430074

出　　处：《煤田地质与勘探》2025年第3期243-250,共8页Coal Geology & Exploration

基　　金：国家重点研发计划项目(2022YFB3706604)。

摘　　要：【目的】在钻探工具表面施加超疏水涂层能有效缓解钻头因泥包和岩心内管堵塞所带来的挑战,然而,超疏水表面的机械稳定性不足,这一局限性在一定程度上阻碍了其在实际作业中的广泛应用。【方法】为提高镀层的耐久性,通过复合电沉积技术将金刚石微粉共沉积于镍铜复合镀层中,并使用1H,1H,2H,2H-全氟癸基三乙氧基硅烷(1H,1H,2H,2H perfluorodecyltrimethoxysilane,PFDTES)进行表面改性。采用多种测试方法研究1μm和20μm金刚石的质量分数对复合镀层表面形貌、粗糙度、超疏水性和超疏水耐久性的影响,结合EDS和FTIR技术分析复合镀层的化学成分,并进行了冲刷磨损实验。【结果和结论】结果表明:(1)高比例的1μm金刚石促进了花椰菜状团簇的形成和发育,显著提升了镀层的超疏水性。氟化改性后镀层表面成功接枝PFDTES分子,有效降低了表面能。(2)只含有1μm金刚石的镀层展现出最佳的微纳分级结构,具有优异的超疏水性能,接触角高达159.3°±1.5°,滚动角为0.5°±0.2°。(3)冲刷磨损实验显示,1μm金刚石增强了花椰菜状团簇的强度和硬度,而20μm金刚石可以保护团簇,尤其是侧面,免受石英砂的直接磨损。当1μm金刚石质量分数为75%时,两种粒径金刚石的协同保护效果最佳,镀层展现出优异的超疏水耐久性和防泥皮结垢效果。研究成果不仅为解决钻探作业中频发的钻头泥包和钻具内壁泥皮结垢问题提供了可行的解决方案,还为增强超疏水涂层的耐久性拓展了思路,具有显著的潜在应用价值。[Objective]Applying superhydrophobic coatings on drilling tool surfaces can effectively alleviate the challenges posed by drill bit balling and core barrel blockage.However,the limited mechanical stability of superhydrophobic coatings has somewhat hindered their widespread application in practical operations.[Methods]To improve the durability of superhydrophobic coatings,this study co-deposited diamond micropowder into Ni-Cu composite coating using composite electrodeposition,followed by surface modification using 1H,1H,2H,2H-perfluorodecyltrimethoxysilane(PFDTES).Employing a variety of testing methods,this study investigated the impacts of the mass fractions of diamonds with particle sizes of 1μm and 20μm(also referred to as diamonds W1 and W20,respectively)on the surface morphology,roughness,superhydrophobicity,and superhydrophobic durability of the composite coatings.The chemical composition of the composite coatings was analyzed using energy-dispersive X-ray spectroscopy(EDS)and Fourier Transform Infrared(FTIR)spectroscopy,and erosion experiments on the coatings were carried out to explore their wear resistance.[Results and Conclusions]The results indicate that a high proportion of diamond W1 promoted the formation and evolution of cauliflower-like clusters,significantly enhancing the coatings’superhydrophobicity.After fluorination modification of the coatings,the PFDTES molecules were successfully grafted onto their surfaces,effectively reducing their surface energy.The coatings containing only diamond W1 exhibited the optimal micro-nano hierarchical structure.These coatings delivered excellent superhydrophobic performance,with a contact angle reaching up to 159.3°±1.5°and a sliding angle of 0.5°±0.2°.The erosion experiments revealed that diamond W1 boosted the strength and hardness of cauliflower-like clusters,while diamond W20 protected the clusters(especially their sides)from direct wear by quartz sand.When the coatings contained 75%(mass fraction)diamond W1,diamonds with two particle sizes exhi

关 键 词：金刚石 粒径 电沉积 超疏水性 耐久性 镍铜复合镀层 钻具表面改性 

分 类 号：P634.5[天文地球—地质矿产勘探]