鳞片状锌基环氧富锌底漆的研究

比较了鳞片状锌粉和普通球状锌粉的特点及应用原理；对比了以片状锌为主的环氧富锌底漆中片状锌与其他片状颜料及防蚀颜料联合应用的效果     

水性环氧富锌底漆的制备与性能研究

为开发新型水性富锌底漆,在开发具有优良水可稀释性能的水性固化剂基础上,研究了一种环境友好的双组分水性环氧富锌底漆.将锌粉等颜填料和各种助剂均匀分散于以乙醇为溶剂的水性环氧树脂固化剂中,制备出了稳定的固化剂组分;通过溶剂析出率测试和高速离心测试,对锌粉在水性环氧树脂固化剂中的稳定性进行了研究;通过对涂膜的防腐蚀性能的测试...     

鳞片状在环氧富锌底漆的研究

比较了鳞片状锌粉和普通球状锌粉的特点及应用原理;对比了以片状锌为诉环氧富锌底漆中状锌与其他片状颜料及防蚀颜料联合应用的效果。     

水性环氧富锌防腐蚀漆的研制

为了解决溶剂型富锌漆环境污染的问题,以改性水性环氧树脂为基料,添加改性多元胺固化剂、70%~80%锌粉,同时辅以助剂,研制了环境友好型水性环氧富锌防腐蚀漆,探讨了树脂的选择和加入比例、锌粉用量、固化剂选择和用量等对水性环氧富锌防腐蚀漆性能的影响。结果表明:漆膜性能优异,可应用于各种重防腐蚀领域的金属底涂或中涂。     

水性环氧聚氨酯富锌涂料的防腐蚀性能研究

为制得环保且防腐蚀性能优异的富锌涂料,引入环氧树脂来改性水性聚氨酯,以水性环氧聚氨酯为基料制备富锌涂料,通过对其腐蚀电位和电化学阻抗谱(EIS)的测试分析,研究了添加不同含量锌粉的富锌涂层在3%NaCl溶液中的腐蚀电化学行为,并与添加少量铝粉的富锌涂料及传统富锌涂料进行了对比.结果表明,水性环氧聚氨酯富锌涂料的防腐蚀能力比传统环氧富锌底漆强;锌粉的添加量对涂层的防腐蚀效果有一定的影响,添加少量铝粉能提高涂层的防腐蚀性能.     

新型水性环氧富锌涂料的制备及性能研究

为了满足重防腐蚀领域对涂料耐久性的需要,通过调节环氧富锌涂料中锌粉的比例、添加硅烷偶联剂、优化涂料防沉体系,制备了耐腐蚀性能强、储存稳定性高的水性环氧富锌底漆.研究了该涂料中锌粉、偶联剂、防沉剂3种组分对涂层耐腐蚀性能、附着力及储存稳定性的影响,并将该涂层与环氧中间漆、水性聚氨酯防腐蚀面漆组成了复合涂层体系,分析测试了复合涂层体系的耐中性盐雾腐蚀性能及附着力.结果表明:制备水性环氧富锌底漆的过程中,控制有机膨润土和亲油性气相二氧化硅的含量可提高涂料的储存稳定性,其中锌粉加入量为55.0％(质量分数,下同),防沉剂有机膨润土和气相二氧化硅含量分别为0.8％和1.0％时,涂料的储存稳定性可达10级;硅烷偶联剂加入量为1.5％时,涂层与基体间的结合强度可达到11.3 MPa;该涂料作为底漆与环氧中间漆、水性聚氨酯面漆组成的复合涂层体系,在经过3 600 h中性盐雾试验后不剥落,可用于重防腐蚀领域.     

低顺橡胶挥发分含量测试的不确定度评定

以低顺橡胶P30AF为例,依据ASTMD5668-2009在电热恒温鼓风干燥箱中进行了挥发分含量测试,对其挥发分含量测试过程中的不确定度分量进行了分析和评定,并给出了具体数值。结果表明：低顺橡胶P30AF挥发分含量X=0．67％,扩展不确定度U=0．09％,包含因子k=2,置信概率p=95％;其测量不确定度主要来源为由样品的不均匀性引入的不确定度。     

手工除锈对WRZ型水性无机富锌涂料体系附着力的影响

调查了手工除锈程度、表面处理剂种类对WRZ水性无机富锌涂料体系与钢基体附着力的影响,初步确定了WRZ型水性无机富锌涂料体系的手工除锈涂装工艺。     

锌黄环氧酯底漆的电化学阻抗谱特性

利用电化学阻抗（EIS）技术对铝合金结构件上的锌黄环氧酯底漆进行了研究，提出了相关有效电路。结果表明，浸泡中期，随着浸泡时间的延长，涂膜电阻有一定程度的增加。     

Formation of chromium rich oxide scales for protection against metal dusting

Abstract

Metal dusting is a disintegration of metals and alloys into graphite and metal particles, caused by strongly carburizing gas mixtures mainly in the temperature range 400–700°C. Protection of steels against metal dusting is possible through the formation of dense chromium rich oxide scales but it is not guaranteed that such scales are formed at low temperatures, even on high Cr-steels.

Surface analytical studies have been conducted on the formation and composition of the oxide scales on 9–20%Cr steels. The growth of oxide films was followed by AES for 3 hours at 10^–7 mbar O₂ great differences were observed in dependence on surface finish. On ground samples, Mn and Si appeared early and Cr-rich oxide was formed, whereas on chemically etched samples Fe-rich oxides grew.

After long term exposures (240 h) under metal dusting conditions, i.e. in CO–H₂–H₂O mixtures at 600°C, thin Cr-rich scales were observed on ground steels which were impermeable to carbon whereas on chemically etched steels thick Fe-rich scales had grown and carbon penetration was detectable. Accordingly, the oxide formation on Cr-steels at relatively low temperatures strongly depends on the surface treatment. Any surface working such as grinding and sand-blasting etc. introduces dislocations and causes a fine-grained microstructure near the surface, and the dislocations and grain boundaries act as rapid diffusion paths for supply of Cr to the surface in the first minutes of exposure, which leads to the formation of a protective oxide scale.     

纳米CaCO3改性及其在环氧改性丙烯酸底漆中的应用

采用复合改性剂对纳米CaCO3进行改性,探讨了改性剂用量、乳化温度、乳化时间和保温时间等因素对纳米CaCO3改性的影响,并优化了最佳操作工艺条件:改性剂用量为4.83%(质量分数)纳米CaCO3、乳化温度为80℃、乳化时间为40min和保温时间为60min.测定了改性和未改性纳米CaCO3的活化指数、吸油量、沉降体积及其在邻苯二甲酸二辛酯(DOP)中的糊粘度,并用红外光谱对改性和未改性纳米CaCO3进行了表征,结果表明改性纳米CaCO3的亲油性显著提高.制备了纳米CaCO3复合环氧改性丙烯酸底漆,与传统底漆相比其耐水性、耐盐水性和耐盐雾性显著改善.     

环氧酚醛衍生物的检测方法与应用

以金属包装涂料中双酚A类环氧衍生物为研究对象,开展了对其检测方法、迁移规律和工艺优化方面的研究。探讨了BADGE,BFDGE及其衍生物的高效液相色谱-荧光检测方法,并将该检测方法用于涂料生产工艺的优化。并最终确定了最优的生产工艺条件,即烘烤温度为190℃,涂膜厚度为11g／m^2,烘烤时间为12min。在此工艺条件下,BFDGE,BADGE,BADEG·2H2O,BFDEG·2H2O的残留质量浓度最少,分别为0．066,0．047,0．092,0．07μg／mL。     

具有层状碱金属盐结构的氢氧化氨基苯甲酸锌的制备及表征

以自制的β-Zn(OH)2和氨基苯甲酸为原料,水热合成了具有层状碱金属盐(LBMS)结构的氢氧化氨基苯甲酸锌化合物。通过XRD、TG-DTA、SEM和TEM分析研究了合成产物的结构、形貌和热稳定性,探讨了合成条件对水热反应产物的影响及合成产物在有机溶剂中的剥离反应。当o-NH2C6H4COOH/Zn的摩尔比为1.2,水热温度70℃下反应12h时,得到的层状物具有板块状粒子特征,层间距为1.33nm;当m-NH2C6H4COOH/Zn的摩尔比为1.8,水热温度40℃下反应24h时,得到的层状化合物具有纤维状粒子特征,层间距为1.08nm。合成的层状物在醇溶剂中可发生剥离反应,层状氢氧化邻氨基苯甲酸锌在正丁醇中的剥离量为0.12g.L-1,层状氢氧化间氨基苯甲酸锌在乙醇中的剥离量为0.18g·L-1。     

气相防锈材料中亚硝酸盐含量快速半定量检测方法研究

研究了一种适合于应用现场的气相防锈材料亚硝酸盐含量快速半定量检测方法。亚硝酸盐在弱酸性条件下，与对氨基苯磺酸生成重氮盐，重氮盐再与N，N-二甲基-α-萘胺反应生成红色染料。该红色生成物与配色剂A溶液进行颜色复配，由于亚硝酸盐含量的不同，产生由无色至浅绿色、绿色、靛青色、浅紫色、紫色、紫红色等一系列色阶。亚硝酸盐含量不同，色差极为明显，利用目视比色法可快速判断亚硝酸盐的含量。经与国家标准检测方法对比，本方法的检测结果准确可靠。     

Effect of carbon fibres on the static and fatigue mechanical properties of fibre metal laminates

It is crucial to understand the characteristic fatigue crack initiation and its growth mechanisms, as well as the relationship between the mechanical properties and the fatigue damage evolution in fibre metal laminates (FMLs). Two types of FML were studied in this work: a polyacrylonitrile‐based carbon fibre epoxy matrix composite sandwiched by Ti‐6Al‐4V (Ti‐alloy) sheets (IMS60‐Ti) and a pitch‐based carbon fibre epoxy matrix composite sandwiched by Ti‐alloy sheets (K13D‐Ti). The static and fatigue mechanical properties of IMS60‐Ti and K13D‐Ti were investigated. The increased failure strain of the FML was greater than that of carbon fibre‐reinforced polymer (CFRP) matrix composites. The fatigue life of IMS60‐Ti was much longer than that of K13D‐Ti. The fatigue damage process in IMS60‐Ti was related to the fatigue creep behaviour of the Ti‐alloy face sheet and mode II cracking at the CFRP/Ti‐alloy interface, and the damage in K13D‐Ti was related to the K13D CFRP laminate.     

ICP-AES法测定斑岩型铜矿石中铜铅锌钼

本文用ICP-AES法测定斑岩型铜矿中的铜铅锌钼。采用盐酸硝酸氢氟酸和高氯酸四种酸混合消化样品。研究仪器的最佳工作参数,用基体一致时测定待测元素来校正基体干扰,分别找出仪器测定的最佳分析谱线进行样品测量。本方法的检出限在0.21?g/g～0.65?g/g。测量结果的相对标准偏差为0.36%～1.8%(n=8),回收率在95%-102.6%之间。     

Production and properties of micro‐porous glas bubble zinc and aluminium composites

Micro‐porous syntactic foams were produced by means of integration of glass bubbles into aluminium and zinc matrices. Preforms of glass bubbles were pressure infiltrated with the alloys AlSi9Cu9 ans ZnAl4Cu using squeeze casting. The preforms were sintered thermically without the use of bonding agents. Using the combination of different sintering steps syntactic foams with locally different densities could be produced. The mechanical properties of the foams were tested indicating a high compression strength of the foams and a very good compression energy absorption. Furthermore, corrosion behaviour and behaviour at higher temperatures were investigated.