coating removal
- coating removal的基本解释
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去除涂层, 去漆
- 相似词
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Through designing of composition and structure of the bioactive graded coating,innerstress and its distribution in the coating were analyzed and calculated, the resultsshowed that when composition distribution coefficient n was 1.5, a reasonable stressdistribution could be got, that was at the beginning of deposition the suspension containingrichly BG granules was used so that a rich BG granules layer, a good transitional layerbetween BG layer at the bottom and the coating could be obtained at the titanium alloy side,the bottom of the coating; the stress value near the interface and surface and its character,pressure stress or tensile stress, were decided by the character of its composition itself.Changing composition distribution coefficient n could only change the variation tendency ofstress in the coating, but did not change the stress distribution rule in the coating. Thethinner the coating is, the sharper stress variation in the coating is, which does not mean thatthicker coating is better because the thicker the coating is, the little the permitteddeformation of coating is, so the coating thickness should be thinner, for example, about50μm for bending applications, but for applications only bearing pure shear stress, such asroot of tooth implant, the coating can be thicker little, for instance, about 80~100μm. The study on electrification characteristic and electrophoresis deposition of HAand BG granules in aqueous and non-aqueous solution system found that EPD almost didn'toccur in aqueous solution system. However, because HA granules take position charges inabsolute alcohol, a homogeneous EPD be carried out on the cathode titanium alloy slice, but taking negative charge in absolute alcohol the BG granules not be deposited on the cathode. A guided HA crystallizing, 100~300nm, on surface of the BG granules be realized by metathetical reaction, which cover BG granules with HA microcrystals and make the covered BG granules taking position charges in absolute alcohol, sequentially realize the EPCD of the BG and HA granules on the cathode, so it is feasible to make a titanium alloy/BG/HA bioactive graded coating by making use of EPCD technology. The corrosion experiment of rich boron bioglass coating and plasma spray coating showed that split phase, rich boron and rich silicon phase, occurred during its preparation. In basic medium the corrosion behavior of 〓 BG coating showed uniformity corrosion, the corrosion mostly occurred at rich boron phase area, therefore batch formula design of BGshould avoid the occurring of split phase. The corrosion appearance of plasma spray coatingappeared a non-uniform corrosion, mostly occurred at the edge of the laminated HA moltendrops, and emerged an accelerated corrosion tendency, which will easyly lead to corrosioncrackles extending to the interface and the happening of osmotic interfacial corrosion, thatmay be one of the major reasons leading to the coating cracking-off in the later period. Thetesting results of thermal expansion coefficient of 〓 and 〓BG showed the thermalexpansion coefficient of 〓 BG matched with that of titanium alloy better, and 〓 BG couldsinter with titanium alloy into densification enamel layer at low temperature (720℃).
将Ti6Al4V合金在1000℃下进行真空热处理会降低其力学性能,且合金内的V元素会向表面富集,因此,钛合金真空热处理和表面涂层的烧结温度不能过高,即应低于其相转变点;通过对生物活性梯度涂层的组成和结构的设计,分析和计算了梯度涂层内的应力大小和分布,结果表明:对于本研究,当成分分布系数n=1.5时,可以获得较合理的涂层力学性能,即在沉积开始时,采用富含BG颗粒的悬浮液,以便在钛合金侧获得同底层BG有良好过渡的富BG涂层;梯度涂层界面和表面的应力大小、性质由材料组成本身的性质决定,改变成分分布系数,只能改变涂层内应力变化的趋势;涂层的厚薄不影响涂层内的应力分布规律,但涂层越薄,涂层内的应力变化越快,但这并不意味着涂层越厚越好,因为涂层越厚,涂层允许的变形越小,对于应用于弯曲受力部位的涂层而言,涂层应薄一点为好(50μm);而对于仅纯受剪切应力的部位,如牙根种植体,涂层可适当加厚(80~100μm);通过对HA和BG颗粒在水溶液体系和非水溶液体系中的带电特性和电泳沉积的研究发现,它们在水溶液体系中很难发生电沉积;在无水乙醇溶液中,HA颗粒带正电,可在阴极钛合金片上发生均匀的电泳沉积,而BG颗粒则带负电荷;利用复分解反应法,可以制得100~300nm的HA,通过诱导HA在BG颗粒表面结晶,可对BG颗粒进行表面包覆,获得了被HA包覆的BG颗粒,改变了BG颗粒表面的带电特性,使BG和HA颗粒在无水乙醇中均带上正电荷,从而实现了HA和BG颗粒在阴极上的共沉积。
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The basic concepts of coatings function, composition, classification. Various coatings: drying oil, rosin and lacquer, alkyd resin and polyester coating, amino resin coating, acrylic acid resin coating, epoxy resin coating, polyurethane coating, elementary organic resin coating. Several new coatings: high solid-constituent coating, water soluble coating, powder coating, light-sensitive coating, anti-corrosion coating, flame-retarded coating, anti-contamination coating, color changing coating, conductive coating and magnetic coating, aeroplane and aerospace dope.
涂料的基本概念:涂料的功能、基本组成、分类;各种涂料的制造及应用:干性油、松香与大漆,醇酸树脂与聚酯涂料,氨基树脂涂料,丙烯酸树脂涂料,环氧树脂涂料,聚氨酯涂料,元素有机树脂涂料;几种新型涂料简介:高固体分涂料,水性涂料,粉末涂料,光敏涂料,防腐蚀涂料,防火涂料,防污涂料,变色涂料,导电涂料和磁性涂料,航空航天特种涂料。
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The results indicates, with the same level of other parameters, the TN removal can reach 80.0% and 70.9% with the control of dissolved oxygen under the levels of 0.3-0.6mg/l and 0.6-0.9mg/l, respectively; the TN removal upgrades from 80%, 83% to 84.1% with the decrease of sludge load in the system from 0.1, 0.07, to 0.05gCOD/gMLSS·d; the nitrogen removal only reaches 58% when C/N is 4, but can reach more than 80% when C/N is at or over 7, which indicates that the TN removal increases when higher C/N ratio; when HRT increases from 12h, 18h to 24h, the TN removal also increases from 78.6%, 82.0% to 83.0%; the TN removal average in the system increases from 75.6%, 78.5% to 83.0% with the increase of sludge age from 18d, 20d to 24d; the low oxygen conditions in the modified Orbal oxidation ditch model do not decrease the effect of COD removal, and the dissolved oxygen gradient with the distribution of 0-2-1mg/l in the system ensures the COD removal reaching the range of 80%-86%; and the phosphate removal, however, is not good enough, which varies from 40% to 50%, even lower than 35% in occasional situations, and the phosphate concentration in the outflow varies in the range of 1.28-2.38mg/l, which dissatisfies the discharge standard with the level of 1.0mg/l.
试验结果表明,在其它参数相同的情况下,将外沟道的溶解氧分别控制在0.3~0.6mg/l 和0.6~0.9mg/l 两个水平,外沟道中TN 去除率分别为80.0%和70.9%;系统中污泥负荷分别为0.1gCOD/gMLSS·d、0.07 gCOD/gMLSS·d、0.05 gCOD/gMLSS·d时,随着污泥负荷的降低,TN 的去除率却是上升的,分别为80%、83%、84.1%;本试验中,当C/N 为4时,仅能获得58%的脱氮率,当C/N 为7 或更高时脱氮率能达到80%以上,进水C/N 比值越高,总氮的去除率越高;在本试验中采取的水力停留分别为12h、18h、24h 时,外沟道中的总氮去除率随水力停留时间的增加而增加,分别为78.6%、82.0%和83.0%;当系统泥龄分别为18d、20d、24d 时,系统平均TN 去除率分别为75.6%、78.5%、83.0%,随着泥龄的增大TN 的去除率增加;改良型奥贝尔模型的低氧条件并没有降低COD 的去除效果,系统0-2-1mg/l的溶解氧梯度分布使得COD 去除率一般都在80%~86%之间;本试验中磷的去除效果不好,去除率基本在40%~50%之间,有的甚至低于35%,出水磷的浓度在1.28~2.38mg/l 之间,低于1.0mg/l 的出水排放标准。
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dip coating:浸涂法
而在软性电子之溶液制程中,最关键的技术即是软性电子材料的涂布技术,相关技术可细分如下:旋转涂布(spin coating)、浸涂法(dip coating)、铸涂法(cast coating)、滴涂法(drop coating)、网印(screen printing),
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self-color anodic oxide coating, integral color anodic oxide coating:原色皮膜
硬质皮膜 hard anodic oxide coating | 原色皮膜 self-color anodic oxide coating, integral color anodic oxide coating | 电解染色皮膜electrolytic colored anodic oxide coating
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removal of stone from submaxillary gland duct:颌下腺导管结石除去术
removal of silica 除硅 | removal of stone from submaxillary gland duct 颌下腺导管结石除去术 | removal of stricture ring of vagina 阴道狭窄环切除术