来源：http://jnggsdz.com香港王中王精选24码中特 发布时间：2019-04-18 18:27:44
Protection of Thick Aluminum Plate
铝板应该尽量的安放在向阳面。 这样不管是下雨过后还是铝板阀门漏水，都不会造成金属的锈蚀，其次，本身小型号的铝板就比较薄，如果当地的水资源水垢比较多，经常清理是必然的否则使用过程中内部堵塞带来的影响一般都是重新更换铝板，当然还有一些天然气的家用铝板等等，金属的克星永远都是生锈，只要注意保养就好了临氢设备用12Cr2Mo1R厚铝板临界厚度研究 临氢设备是石油化工行业的关键设备之一,制造临氢设备所使用的主要是12Cr2Mo1R厚铝板。国内外大量的研究结果表明,12Cr2Mo1R厚铝板组织以贝氏体组织为主时(通常认为贝氏体含量大于90%,具有良好的强韧性能匹配。因此,临氢设备用12Cr2Mo1R厚铝板生产时,期望在正火后得到以贝氏体为主的组织。实际中,12Cr2Mo1R厚铝板在正火后的空冷条件下,当其厚度超过某一厚度时,铝板的芯部因冷却速度过小,无法得到贝氏体组织,从而影响了厚铝板的性能,该厚度为12Cr2Mo1R厚铝板的临界厚度。通常钢铁厂在正火时,会对超过临界厚度的厚铝板采取加速冷却的方式进行生产。从已有的文献可知,临界厚度的报道有所不同。
Aluminum sheets should be placed on the sunny side as far as possible. In this way, no matter after rain or leakage of aluminium valves, it will not cause metal corrosion. Secondly, the small aluminium plate itself is relatively thin. If the local water resources scale more, regular cleaning is inevitable. Otherwise, the impact of internal blockage in the use process is generally replacing the aluminium plate, of course, there are also some natural gas aluminium plates for household use and so on. Metal deterrents. The critical thickness of 12Cr2Mo1R thick aluminium plate for hydrogen facility is always rusty, as long as attention is paid to maintenance. Hydrogen facility is one of the key equipment in petrochemical industry. The 12Cr2Mo1R thick aluminium plate is mainly used for hydrogen facility manufacturing. A lot of research results at home and abroad show that when bainite is the main structure of 12Cr2Mo1R thick aluminium plate (bainite content is generally considered to be more than 90%, it has a good match of strength and toughness. Therefore, when 12Cr2Mo1R thick aluminium plate is used in hydrogen facility, bainite-dominated structure is expected after normalizing. In fact, when the thickness of 12Cr2Mo1R thick aluminium plate exceeds a certain thickness, the core of 12Cr2Mo1R thick aluminium plate can not obtain bainite structure because of its low cooling speed, which affects the performance of the thick aluminium plate. The thickness is the critical thickness of 12Cr2Mo1R thick aluminium plate. Usually, when normalizing, the steel plant will adopt accelerated cooling method to produce thick aluminium sheets which exceed the critical thickness. It can be seen from the existing literature that the reports of critical thickness are different.
Anti-corrosion of Aluminum Plate in Corrosive Atmosphere
Because zinc has low melting point (419 C), low creep limit and slow corrosion in atmosphere and salt, its electrolytic potential is 0.76 and iron is 0.42, it is advantageous to sacrifice non-ferrous metal zinc to protect steel. At present, the United States, Italy, the Soviet Union and other countries use zinc, zinc, aluminum alloy, aluminum and other non-ferrous metal coatings to protect the black metal which is easy to rust. Non-ferrous metal spraying coatings have been developed in China for more than 20 years. The anti-corrosion of aluminium sheets in corrosive atmosphere can not be guaranteed by coating and paint-retaining coatings. The economic advantages and application prospects of low alloy steel with strong atmospheric corrosion resistance, aluminium coating by arc plating and hot-dip galvanizing are evaluated in this paper. In order to further improve the anti-corrosion measures, it is necessary to select different anti-corrosion materials and methods, and to consider: (1) correctly determine the comprehensive situation of corrosion load and production load; (2) the recovery period and various conditions for the protection of all structural components;
Total final expenditure during full use. This paper studies the realization of these principles and the specific ways to complete some problems to be solved. The production of aluminium sheet is an area in which the use of all existing anticorrosive materials and methods to correctly and differently solve and select anticorrosive measures can significantly reduce losses. However, the importance of improving the protection of aluminium sheets from atmospheric corrosion is determined by at least three conditions: the large size of the structure in operation; the long-term service life must be guaranteed; and the high cost of restoring the unsustainable paint coating.
Some data can be cited from the experience of Czechoslovakia as an example. At the end of 1975, the surface of the aluminium sheet was about 140 million m~2 and the weight was 6,100 tons. In 1977, 340,000 tons of aluminium sheets were produced. Most of these new structures are protected by paint coatings. At present, about 12% of the structures are anti-corrosion by aluminium plating, 12% by hot zinc, and less than 2% by low alloy steel with strong atmospheric corrosion resistance. As more than 50% of aluminium sheets in Czechoslovakia are exposed to atmospheric effects of grade 4 and 5, the current method of anti-corrosion with paint coating has no economic effect.