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SYFl—1型海洋金属防腐装置是一种用于潮汐发电设备、海洋石油平台、输送海水管道、船舶等海洋金属防腐的装置。文中对该装置的工作原理、组成、主要技术性能、特点以及实现方法作了概要描述。 相似文献
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An annual in situ corrosion experiment of carbon steel and low alloy steel is reported in this paper. The results show that the corrosion rate varies with the beginning month of immersion. The corrosion rates of 09CuWSn steel panels immersed at the end of April and May when larger fouling organisms grow heavily are 0.1180 and 0.1342 mm/y respectively, 相似文献
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Microbial corrosion of metal materials can be due mainly to a number of differentgrounps of organism, including bacterium, fungus, yeast and protozoa. Fungi not only de-teriorate some metal materials with above others, but also under given conditions cause metalsto corrode themselves or lead to further extended procession of metal corrosion. The paperstudies corrosion of fungi on metal materials, and deals briefly with the material selecting 相似文献
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在模拟生态环境条件下研究了铜(Cu2+)、镉(Cd2+)和锌(Zn2+)3种重金属离子对2种海洋饵料微藻(青岛大扁藻(Platymonas helgolandica)和等鞭金藻8701(Isochrysis galbana 8701))的急性毒性效应,分析其对种群增长的影响,并利用透射电镜对微藻亚显微结构的变化进行分析。在实验浓度范围内,2种微藻的种群增长对3种重金属离子的急性胁迫表现出类似的变化趋势,随着胁迫浓度的增加,微藻的相对增长率均呈现出不断下降的趋势;通过比较2种微藻的48hEC50和96h-EC50发现:3种重金属离子的毒性程度为Cu2+Cd2+Zn2+,等鞭金藻8701对重金属胁迫的敏感性高于青岛大扁藻。2种微藻的亚显微结构观察显示,二者的膜结构及细胞核对Cu2+胁迫并不太敏感;与对照组相比等鞭金藻8701的色素体及贮能物质受影响较严重,而青岛大扁藻的叶绿体及淀粉粒受影响较大。 相似文献
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21世纪是海洋世纪,也是人类对海洋全面认识、充分利用和切实保护的世纪.通过对海洋产业特征和中国海洋产业现状进行分析,并思考发展海洋经济的对策,阐述了海洋经济的可持续发展问题. 相似文献
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从生态文明建设的总体需要出发,阐述了海洋生态文明建设是实现经济和社会科学、协调、可持续发展的必然要求.海洋生态文明建设主要包括海洋生态意识文明、海洋生态行为文明、海洋生态道德文明、海洋生态制度文明和海洋生态产业文明等主要方面.推进海洋生态文明建设重点要提高海洋生态意识,发展海洋生态产业,强化海洋环境保护,推进海洋科技创新. 相似文献
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Evaluation of the Effect of Marine Ranching Activities on the Tongyeong Marine Ecosystem 总被引:1,自引:0,他引:1
Using ecosystem models (Ecopath, Ecosim, and Ecospace), we assessed the structure and function of the Tongyeong marine ranching ecosystem and compared changes in various ecosystem components before and after marine ranching activities. An ecosystem structure model, Ecopath, was used to estimate the changes in biomass and trophic level of major species or groups, the relative contribution of target species or groups to the total flow of energy (throughput), and niche overlaps and impacts of competition between major species or groups. It showed that the Tongyeong ecosystem had 4 trophic levels. A large amount of energy flows occurred at trophic levels 3 and 4, and jacopever rockfish (Sebastes schlegelii) and black rockfish (S. inermis) that were target species for stock enhancement belonged to trophic level 3, indicating that those two species played an important role in the ecosystem. Using an ecosystem dynamic model, Ecosim, the mechanism of dynamic changes in the quantity of target species or groups was investigated to identify the effects of stock enhancement activities and impacts of fishing intensity. After marine ranching activities, the biomass of two target species had increased, while those of most other fish groups decreased. Assuming that fishing mortality was double the current level, the biomass of most fish groups decreased but jacopever rockfish maintained its current stock level due to excessive stock enhancement and low fishing mortality in recent years. An ecosystem space model, Ecospace, was employed to simulate the temporal and spatial dynamics of the biomass of organisms in order to examine how resource enhancement activities have changed the distribution and abundance of target species or groups in the ecosystem. The distribution pattern of jacopever rockfish and black rockfish showed stronger aggregations around reefs and rocky areas with high stock densities after ranching. However, most of the other fish groups exhibited lower densities in the marine ranching area, while they showed higher densities outside the marine ranching area. Thus, it would be necessary to take appropriate holistic management actions based on the ecosystem-based approach to keep the ranching ecosystem healthy and to maintain the fishery production of the ecosystem at the maximum sustainable level. 相似文献
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锌、铝及其合金涂层对钢铁的防护,不仅对阴极起保护作用(Gartland,1987), 对涂层本身也具有良好的抗腐蚀性能。此外,涂层中金属微粒表面形成的致密氧化膜,也起到了防腐蚀的作用。在不同大气环境下,锌、铝有良好的耐蚀性,其腐蚀速率比钢铁要低得多(李言涛,1998)。采用热喷涂锌、铝及其合金涂层对钢铁构件和构筑物进行长效防护早在20世纪20年代就已开始应用,至今仍是普遍采用的防护措施,并在继续发展(李守本等,1989)。20年代初,法国首先用于海水闸门的防腐;40年代美国用于墨西哥湾的海上井架和海上输油管以及舰船的防腐;60年代英、法、德等国海军将这一技术扩大应用到舰船的上部结构和船壳。而金属热喷涂技术在海洋工程中使用非常有限,第一次使用热喷铝涂层防护近海平台的实例是Conoco公司在北海的Murchison结构上的锥形塔,并且已获得了4a良好的使用效能(Fisher et al.,1987;Shaw et al.,1985)。1984年6月,Hutton张力支柱平台(TLP)在北海下水(水深148 m)安装。系链、升降机和锥形塔均采用火焰热喷涂技术喷涂铝涂层进行防护(Tyson,1985)。1992年6月,Hotton平台使用8a后,对升降机绳索进行观察,在飞溅区没有发现腐蚀现象,也没有检测到褐色渗漏效应(Fisher et al.,1995)。 相似文献
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随着人类对海洋资源的深入开发和利用,海洋经济产业模式和本质也在随着社会发展的需求不断演变.从目前来看,沿海国家和地区能否正确把握海洋经济产业的发展趋势直接关系到其能否对自己辖区的海洋经济产业的未来发展正确定位,对于保持海洋经济产业在竞争中处于有利地位非常关键.对海洋经济发展的总体趋势做了定性分析研究. 相似文献
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海水养殖对海洋环境影响的探讨 总被引:2,自引:0,他引:2
海水养殖迅速发展,给海洋造成了严重污染.海水水质污染,主要有营养物污染、养殖用药污染、底泥富集污染.海洋生物污染,主要是外来生物物种入侵和生物物种基因污染,无计划的盲目开发浅海滩涂进行养殖对近岸海域滩涂湿地造成的破坏等. 相似文献
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我国作为海洋大国,拥有广阔的海域和丰富的海洋资源。在全球海洋布局的时代背景下,加快海洋强国建设成为重中之重。国家开展海洋强国建设需要全民海洋意识的全面提升,由此海洋意识教育显得尤为重要。文章根据多年工作经验,从各方面研究数据出发,分析了海洋意识教育的含义以及加强海洋意识教育的重要性。根据我国国民海洋意识调查的现状,从基础教育、高等教育和大众宣传等方面提出了加强海洋意识教育的举措建议。最终得出应加强我国海洋意识教育,建设过硬的海洋人才队伍,以社会主义核心价值观为导向,加快我国海洋强国建设的步伐。 相似文献