四种涂层在模拟油田环境下的腐蚀性能评价

采用不同表面处理方法在N80钢表面上分别制备化学镀Ni—P、电镀Zn—Ni、热喷涂Ni—Cr—Fe—Ta—Mo—Ti和热浸镀Al—Zn—Si合金涂层,利用CO2高温高压腐蚀试验等方法评价其在模拟油田环境下的耐腐蚀性能。试验结果表明：四种涂层的耐腐蚀性能按Ni—P、Ni—Cr—Fe—Ta—Mo—Ti、Zn—Ni和Al—Zn—Si合金涂层的顺序依次减小。     

镀NI-P合金技术在我厂冷换设备管束中的应用

简要分析了石化装置冷换设备管束腐蚀原因、化学镀Ni—P合金工艺原理及其性能。阐述了镀Ni—P合金在实际生产中的应用效果和存在的主要问题及解决，提出了化学镀Ni—P合金技术是换热管束表面防腐的一种有效方法。     

Ni—Fe—P化学镀层的组织结构及耐蚀性研究

采用SEM、XRD、能谱等现代测试方法，对Ni—Fe—P化学镀层的组织结构和成分进行了研究；利用失重法和电化学测试方法研究了Ni-Fe—P镀层的耐蚀性及耐蚀机理。实验结果表明，该Ni—Fe—P镀层具有非晶态结构和良好的耐蚀性能。     

Fe—Ni—Cu低膨胀系数合金的研究

本文通过真空熔炼炉冶炼得到Fe—Ni—Cu合金。测合金的成分和合金的膨胀系数，来研究Cu是否可以取代Ni元素满足低膨胀系数合金的性能要求，从而降低Fe—Ni低膨胀合金的成本。结果表明，Cu元素一定程度会增大低膨胀合金的线膨胀系数，合金的成分为Fe57．67％，Ni37．7％，Cu1．66％时合金在150℃时的膨胀系数为2．9×10^6k^-1，可以考虑以Cu代替部分Ni来降低Fe—Ni合金的成本。     

16MnR钢焊接接头表面纳米化及抗湿H2S应力腐蚀性能研究

采用Ni—P-纳米TiO2复合化学镀对16MnR钢焊接接头进行表面处理,通过实验优选出复合化学镀的最佳工艺配方。采用恒载荷拉伸实验,对比试样抗湿H2S应力腐蚀性能,并对表面纳米化抗湿H2S应力腐蚀机理进行探讨。     

IGBT铜焊盘化学镀Ni-Fe-P的制备及耐蚀性研究

针对IGBT模块中铜焊盘的腐蚀问题,采用化学镀方法在铜基板表面制备了Ni-Fe-P镀层.设计正交试验研究了镀液温度、pH、Fe2+/Ni2+摩尔比对镀层成分的影响,并通过电化学腐蚀实验分析镀层的耐腐蚀性能.结果表明,对于镀层中的Fe、P含量,影响因素的主次顺序均为:pH值、温度、Fe2+/Ni2+摩尔比.不同成分的Ni...     

TL-5化学镀Ni—P合金在Nd-Fe—B永磁体上的工艺研究

粘结型Nd—Fe—B永磁体具有组织疏松、孔隙率高、强度低、耐热性差等特点。试验了孔隙封闭、除毛刺、去边角滚光及活化除去基体氧化膜等前处理技术。研究化学镀Ni—P工艺，选择一次性化学镀Ni—P合金工艺，成功地解决了Nd—Fe-B永磁体的防腐技术问题。既简化了工艺流程，缩短了施镀时间，又降低了成本。本研究成果亦适合烧结型Nd—Fe—B永磁体的防腐。     

酸性化学镀Ni-W-P合金镀层工艺研究

酸性化学镀Ni—W—P合金的可能性判定，探索次亚磷酸钠在酸性介质中将WO4^2-还原成W的机理，寻找在施镀条件下使W-O键松驰、断裂的催化剂，实现化学镀Ni—W—P合金镀层的生产应用。     

Ni—P合金电镀及其析氢电催化性能研究

本文研究以钛和铁为基体的Ni—P合金电催化阴极的制备及合金镀层的工艺条件、电沉积机理、镀层的结构、性能的研究。得出电沉积Ni—P合金在沉积速度、镀液维护、镀层结合力强、耐腐蚀性强、耐磨性能等许多方面与化学镀Ni—P合金工艺相比具有明显的优越性。     

Nd-Fe-B永磁体化学镀Ni-P合金工艺研究

粘结型Nd—Fe-B永磁体具有组织疏松、孔隙率高、强度低、耐热性差等特点。试验了孔隙封闭、除毛刺、边角滚光及活化除去基体氧化膜等前处理技术。研究化学镀Ni—P工艺，选择一次性化学镀Ni—P合金工艺，成功地解决了Nd—Fe-B永磁体的防腐技术问题。既简化了工艺流程，缩短了施镀时间，又降低了成本。本工艺亦适合烧结型Nd—Fe-B永磁体的防腐。     

气体多元共渗与化学镀复合处理试样的性能分析

研究了Q235钢经气体多元共渗加化学镀复合处理后，试样表面复合处理层的结构与形貌、显微硬度和抗盐雾腐蚀特性。实验结果表明，复合处理层的结构由Ni-P、NiaP3、NiP4、Fe3N、Fe2N、Fe3O4、Fe2O3和少量的FeS、Fe2C构成，其硬度是气体多元共渗处理后表层硬度的1．6-1．7倍，抗蚀性能相对于单一气体多元共渗或化学镀技术处理大约提高了3．7-5．5倍。     

Influence of uniaxial deformation on the corrosion performance of pre-coated packaging steel

The influence of uniaxial deformation on the corrosion performance of electrolytic chromium-coated steel (ECCS) in both the presence and absence of a polymer coating was studied using scanning electron microscopy (SEM), open circuit potential (OCP), potentiodynamic polarization (PP) measurements and electrochemical impedance spectroscopy (EIS). The individual and combined contribution of chromium-chromium(III) oxide and the polymer coating was investigated. Specimens were uniaxially deformed to maximum strains of 5, 10 and 25%, respectively. After deformation Lüders bands were observed on the surface of the metal substrates. The corrosion resistance of the ECCS was shown to be better than that of the bare steel, due to the protective properties of the chromium-chromium(III) oxide layer on the surface. The corrosion resistance of the ECCS was found to decrease with strain, to be attributed to the introduction of local defects in the coating leading to increasing exposure of the more active underlying steel with deformation. The PETG (a glycol-modified amorphous PET) coating as such proves to be a very effective barrier layer in protecting the underlying substrate, however, in combination with the bare steel its protective properties decrease with time of exposure and deformation. Combining the individual contributions of the chromium-chromium(III) layer and the PETG coating it was shown that the corrosion performance of the polymer-coated ECCS is significantly better than the polymer-coated bare steel after deformation, which can be also attributed to the good corrosion resistance of the chromium-chromium(III) oxide layers and the improved adhesion of the coating.     

Influence of uniaxial deformation on the corrosion performance of pre-coated packaging steel

The influence of uniaxial deformation on the corrosion performance of electrolytic chromium-coated steel (ECCS) in both the presence and absence of a polymer coating was studied using scanning electron microscopy (SEM), open circuit potential (OCP), potentiodynamic polarization (PP) measurements and electrochemical impedance spectroscopy (EIS). The individual and combined contribution of chromium-chromium(III) oxide and the polymer coating was investigated. Specimens were uniaxially deformed to maximum strains of 5, 10 and 25%, respectively. After deformation Lüders bands were observed on the surface of the metal substrates. The corrosion resistance of the ECCS was shown to be better than that of the bare steel, due to the protective properties of the chromium-chromium(III) oxide layer on the surface. The corrosion resistance of the ECCS was found to decrease with strain, to be attributed to the introduction of local defects in the coating leading to increasing exposure of the more active underlying steel with deformation. The PETG (a glycol-modified amorphous PET) coating as such proves to be a very effective barrier layer in protecting the underlying substrate, however, in combination with the bare steel its protective properties decrease with time of exposure and deformation. Combining the individual contributions of the chromium-chromium(III) layer and the PETG coating it was shown that the corrosion performance of the polymer-coated ECCS is significantly better than the polymer-coated bare steel after deformation, which can be also attributed to the good corrosion resistance of the chromium-chromium(III) oxide layers and the improved adhesion of the coating.     

电沉积Ni-P合金镀层耐蚀性的研究

研究了不同磷含量的Ni-P合金镀层在NaCl介质中的耐腐蚀性能。通过浸泡实验,得出不同磷含量的Ni-P合金镀层在w（NaCl）=5%和饱和NaCl溶液中的腐蚀数据,同时还与纯镍镀层、化学镀Ni-P合金镀层、1Cr18Ni9Ti不锈钢以及A3钢进行了比较。     

工程车活塞杆用45~#钢电沉积Ni-WC纳米复合镀层的研究

在工程车活塞杆常用材料45#钢表面电沉积Ni-WC纳米复合镀层。分析了纳米复合镀层的表面形貌和物相结构,测试了纳米复合镀层的耐磨性和耐蚀性,并与45#钢的性能做比较。结果表明:纳米复合镀层表面较平整、均匀,结构较致密,主要由Ni相、WC相组成,Ni相的质量分数为81.25%,WC相的质量分数为6.53%,孔隙率低于0.5%,平均摩擦因数约为0.28;相同条件下,纳米复合镀层的腐蚀速率低于45~#钢的;纳米复合镀层能够提供有效的磨损防护和腐蚀防护,提高45~#钢的耐磨性和耐蚀性。     

Cu/Ni复合仿生超滑表面耐蚀性能研究

本文针对碳钢在海洋环境中腐蚀严重的问题,采用水热法结合化学气相沉积技术及注入润滑油的三步法在碳钢表面制备了Cu/Ni复合仿生超滑表面。研究了仿生超滑表面对碳钢基体的腐蚀防护性能的影响。通过扫描电镜(SEM)、X射线光电子能谱(EDS)分析了碳钢表面水热反应2 h后形成的Cu/Ni涂层的形貌及组成成分;通过接触角测试分析了Cu/Ni疏水表面的润湿性;运用动电位极化曲线和交流阻抗谱(EIS)研究了仿生超滑表面在3.5 wt.%NaCl溶液中的耐蚀性能。结果表明,Cu/Ni膜层呈现微纳米级粗糙结构,Cu/Ni膜层疏水涂层与水滴的接触角为127.8±1°,Cu/Ni仿生超滑表面腐蚀电流密度为2.96×10-7A·cm-2,相比于碳钢基体降低了2个数量级,对碳钢基体具有一定腐蚀防护作用。     

Ni-ZrO2复合镀层的腐蚀摩擦学性能研究

用电镀方法制得Ni-ZrO2复合镀层,研究电镀Ni-ZrO2复合镀层的结构以及其硬度、耐磨性、抗腐蚀性与电镀电流密度的关系。结果表明：复合镀层的显微硬度比纯镍镀层硬度成倍提高,复合镀层耐磨性比镍镀层提高20％以上;抗腐蚀性提高70％以上。X射线衍射结果显示,复合镀层由Ni及非晶ZrO2组成。Ni相为面心立方晶体结构,晶格常数为0．353nm,小于纯镍镀层,晶粒尺寸为23．8nm,大于纯镍镀层。     

Electrochemical and morphological properties of zirconium conversion coating in the presence of nickel ions on galvanized steel

A hexafluorozirconic acid-based conversion coating was applied on a galvanized steel substrate and the influence of nickel ion from nickel sulfate solution (in zirconium solution and in a separate solution) on the corrosion resistance behavior and morphology of zirconium conversion coating was investigated. Electrochemical impedance spectroscopy and DC polarization were conducted in 3.5 wt% NaCl solution in order to optimize practical conditions of zirconium conversion coating and NiSO₄ solution on the galvanized steel substrate. Field emission scanning electron microscopy and X-ray photoelectron spectroscopy were employed to study the morphology and composition of the coated surfaces. Results revealed that the conversion coating obtained from solution containing zirconium and nickel ions (Zr + Ni) did not improve corrosion resistance and uniformity of the coating in comparison with Zr conversion coating in optimized condition. However, a positive effect was obtained from samples coated with separate solutions of zirconium and nickel (Zr–Ni). Improved corrosion resistance and morphology of Zr-based conversion coating were observed in Ni²⁺ concentration, pH, and immersion time of 10 g/L, 6 and 300 s, respectively. Morphology and surface composition analysis proved that two separate layers of conversion coating containing zirconium, zinc, and nickel oxide/hydroxide compounds were formed in the case samples that were treated by separate solutions. This led to better uniformity and higher thickness of the coating. Finally, adhesion strength of epoxy organic coating on galvanized steel with and without conversion coating was investigated by pull-off measurement. Zr–Ni conversion coating in optimum conditions had a positive effect on adhesion of organic coating in comparison with blank sample and samples pretreated with Zr and Zr + Ni conversion coatings through increased surface roughness and physical interlocking.     

海工装备用Q390E钢表面腐蚀防护实验研究

鉴于海工装备用Q390E钢的耐蚀性不理想,对其进行表面处理,在其表面制备Ni-SiO2纳米复合镀层。对Ni-SiO2纳米复合镀层的表面形貌、耐蚀性及腐蚀形貌进行了测试与分析。结果表明:与Q390E钢相比,Ni-SiO2纳米复合镀层表面更为平整,表面粗糙度降低21.2%,相同实验条件下腐蚀率明显降低,表面发生均匀腐蚀,腐蚀程度轻。Ni-SiO2纳米复合镀层的耐蚀性优于Q390E钢的耐蚀性,能起到腐蚀防护作用,提高Q390E钢的耐蚀性。     

Evaluation of Ni‐Mo and Ni‐Mo‐P Electroplated Coatings on Stainless Steel for PEM Fuel Cells Bipolar Plates

Stainless steel bipolar plates (BPPs) are the preferred choice for proton exchange membrane fuel cells (PEMFCs); however, a surface coating is needed to minimize contact resistance and corrosion. In this paper, Ni–Mo and Ni–Mo–P coatings were electroplated on stainless steel BPPs and investigated by XRD, SEM/EDX, AFM and contact angle measurements. The performance of the BPPs was studied by corrosion and conduction tests and by measuring their interfacial contact resistances (ICRs) ex situ in a PEMFC set‐up at varying clamping pressure, applied current and temperature. The results revealed that the applied coatings significantly reduce the ICR and corrosion rate of stainless steel BPP. All the coatings presented stable performance and the coatings electroplated at 100 mA cm⁻² showed even lower ICR than graphite. The excellent properties of the coatings compared to native oxide film of the bare stainless steel are due to their higher contact angle, crystallinity and roughness, improving hydrophobicity and electrical conductivity. Hence, the electroplated coatings investigated in this study have promising properties for stainless steel BPPs and are potentially good alternatives for the graphite BPP in PEMFC.