汽车冷轧钢板化学镀Ni-W-P合金镀层的耐蚀性能 研究

以提高汽车冷轧钢板的耐蚀性能为目的开展研究。在冷轧钢板表面制备了化学镀Ni-WP合金镀层,研究了镀液组成和工艺参数对镀层耐蚀性能的影响。结果表明,在镀液组成为30 g/L硫酸镍、20 g/L次亚磷酸钠、40 g/L钨酸钠、60 g/L柠檬酸钠、12 g/L乳酸以及20 g/L硫酸铵,工艺参数为施镀温度88℃、镀液pH值8.5的条件下,所得镀层(优化后镀层)的腐蚀速率最小,约为0.035 mg/(cm~2·h),是冷轧钢板腐蚀速率的1/3,腐蚀电位相比冷轧钢板正移约300 mV,腐蚀电流密度降低了一个数量级。优化后镀层相对于冷轧钢板属于阴极性镀层,能有效提高冷轧钢板的耐蚀性能。     

国外搪瓷专用钢板开发试验的新进展

本文依据八十年代、中期的国外资料，概略介绍有关搪瓷专用钢板的开发试验的信息。如美国钢铁公司开发的6种搪瓷专用钢板的成分、抗拉性能、可成形性能数，以及涂烧搪瓷层的试验结果。英国钢铁公司就钢板生产过程中对搪瓷作业有影响的诸因素的研究试验概况。联邦德国蒂森冶金公司开发适用于热衷瓷作业的连铸钢冷轧薄钢板的部分试验成果。最后述及部分专家对阿姆科公司、英兰德公司等供应的搪瓷专用钢板以及深拉性连铸钢冷轧薄板的评论。     

热轧钢板和冷轧钢板水基防锈剂的研究

以含有孤对电子的氮、氧原子的有机胺类缓蚀剂为主要组分,添加功能性助剂,制备了一种热轧钢板、冷轧钢板用常温水基防锈剂。通过正交试验确定了主缓蚀剂和辅助缓蚀剂的最佳组成:主缓蚀剂中,癸二酸、十一碳二元酸、硼酸、单乙醇胺、三乙醇胺的质量比为5∶5∶0∶16∶8;辅助缓蚀剂中,100 g浓缩液含D-葡萄糖酸钠0.1 g、乌洛托品10 g、尿素10 g。该水基防锈剂不含亚硝酸盐,无毒环保,具有低泡、稳定性好、成膜完整致密等优点,其5%工作液在相对湿度≥95%、50°C的湿热条件下对热轧钢板和冷轧钢板均表现出良好的防锈性能,防锈期均可达5 d。     

薄膜前处理技术在汽车涂装中的应用

以冷轧钢板和热轧钢板为基材,分别采用不同厂家的薄膜前处理工艺配套阴极电泳涂装,研究了不同工艺条件下涂层的物理机械性能和耐蚀性能,并与传统磷化工艺进行对比,分析了薄膜前处理技术在车厢、车架涂装线应用的可行性。结果表明,对于车厢、车架用冷轧钢板,薄膜前处理工艺配套阴极电泳涂装所得涂膜的物理机械性能与传统磷化工艺相当,虽耐蚀性略低,但仍能满足车厢线的技术要求;对于车厢、车架用热轧钢板,选择不去除氧化皮的工艺,采用薄膜前处理技术也能够满足车厢、车架线阴极电泳配套的技术要求。     

国产搪瓷薄钢板试用经验交流与技术研讨专题会论文目录

论文题目国产宝钢薄钢板的应用宝钢冷轧薄钢板在我厂的应用宝钢搪瓷钢板的试验及应用国产薄钢板在搪瓷制品上应用的初探对国产搪瓷薄板的摸索钢板搪瓷鱼鳞爆的克服和预防国产宝钢冷轧薄钢板的使用质盆及经验国产薄板搪瓷试验总结日用搪瓷钢板的选用应用宝钢冷轧薄板专题工作总结加强生产技术管理,预防搪瓷鳞爆的发生宝钢冷轧薄板及BTC一3试验钢板的可搪瓷性关于采用国产冷轧板试产搪瓷制品的技术报告浅谈搪瓷用冷轧钢板主要性能防爆剂的防爆机理探讨钢板中微益铜对搪瓷密着鱼鳞爆的影响解决钢板搪瓷鳞爆缺陷的技术途径国产宝钢ST14冷轧薄…     

普通冷轧钢板与镀锌板车身共线硅烷表面处理技术研究及应用

将以普通冷轧钢板为主材的车身导入镀锌板车身硅烷处理生产线上后,普通冷轧钢板车身出现了大面积的前处理、底漆质量问题。通过配方调整和工艺改进解决了普通冷轧钢板车身前处理后产生白色点状物及电泳漆膜上出现缩孔、爆孔、块状花斑等问题,成功实现了镀锌板车身和普通冷轧钢板车身在硅烷处理线上的混线生产。     

用于重防腐的水性双组分环氧/胺底漆

比较了不同的双组分环氧/胺体系的附着力和防腐蚀性能及固体环氧树脂的水分散体体系与相对应的溶剂型体系。考虑到胺类固化剂的种类决定了其在不同底材上的附着力,评价了固化剂的用量和防腐蚀颜料的品种对水性双组分环氧/胺体系的性能影响。评述了一种应用于双组分水性环氧涂料的新型憎水型胺类固化剂,着重其对金属底材上的附着力和防腐蚀能力,诸如冷轧钢板、镀锌钢板、喷砂钢板以及铝板。此外还讨论了高性能的双组分水性环氧富锌底漆的应用。     

Cu、V对于CoCrNi中熵合金组织与性能影响

设计了(CoCrNi)_(100-x)(CuV)_x(x=0,3,5)系列中熵合金,并对其做冷轧和不同热处理工艺处理,然后用X射线衍射和扫描电子显微镜对其组织和结构分析,用拉伸仪器和硬度仪对其性能分析。结果表明:在900℃退火处理时,添加0、3%和5%的Cu、V元素强度分别是864 MPa、943 MPa和1001 MPa,塑性分别是53%、46%和43%,Cu、V元素的添加使得Co、Cr、Ni元素在晶界富集,强度得到提升,但是塑性会下降。退火态的强化方式主要是析出强化。同时Cu、V的添加提高也能合金耐腐蚀性能。     

折边胶粘接性能的改性研究

旨在研究单组分橡胶硫化体系折边胶在多板材粘接中的应用。使用液体聚丁二烯为主体,马来酸酐改性聚丁二烯为增粘剂,聚二甲基硅氧烷改性环氧树脂为改性剂,添加一定量的硫化剂、促进剂和填料制备出一种对冷轧钢板、镀锌钢板及铝板均有良好粘接效果的汽车折边胶。结果表明,当马来酸酐改性聚丁二烯(MLPB)用量为10%,聚二甲基硅氧烷改性环氧树脂添加量为6%,固化温度在160～200℃之间,折边胶在3种板材上的剪切强度均大于10MPa,断裂形式均为内聚破坏,耐湿热性较好,性能较优。     

单面镀锌薄钢板

日本钢管公司开发了一种生产汽车车体用的单面镀锌钢板。这种镀锌板具有良好的抗蚀性、可焊性、机械加工性能和上色性能。其生产方法包括:在冷轧薄钢板的一面电镀锌(10～40克/米~2),在非氧化或弱还原气氛和开卷状态下于间隙式退火炉内加热至250～350℃。在这种温度范围保持1～15小时以便形成合金,缓慢冷却后平整。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。