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Section 16 cont/dSHIELDINTRODUCTIONArrow Shield is a combined corrosion preventative, moisture displacing and penetrating fluid which facilitates the long term internal storage of the widest variety of machined metal items in potentially corrosive environments.Shield集防锈、渗透、润滑及排除水分等功能于一体,可以有效地使各种机械零件和金属制品在长期有效的保护下做长期储存和长途运输,以确保免受水分的侵蚀。即使在最恶劣的环境下都能表现卓越:防锈、防潮、润滑。 Formulated to pass code PX24, DEF Standard 68/10-2, Shield has found widespread applications in the North Sea Offshore Oil Industry, general engineering and electrical/telecommunications installations where its ability to protect and lubricate mixed metal systems in salt-spray conditions, provides the end user with a most versatile and effective maintenance fluid.Shield在技术上达到了英国国防部标准PX24,DEF Standard 68/10-2, 已被世界各个工业行业广泛地接受和使用,例如北海石油勘探、钢铁厂、机械加工、电子机电、信息通讯、航空、铁路和其他运输业及汽车制造维修等,是工程师及保养维修人员心目中最理想的保养化工产品。This preparation is available either as a bulk fluid or in aerosol pack.包装规格有普通的液体包装或气雾罐。Film Thickness:2 microns保护膜的厚度:2 微米British Coal Registration (Hazard No. 2472 (Bulk) 5 Litre英国煤矿业注册号 (NSV No. 13-20-1491 (Fluid) (Hazard No. 1091 aerosol) (NSV No. 13-20-9595 aerosol )Salt-Spray Corrosion PreventionOf major importance to offshore industries, marine and engineering establishments is Shields ability to withstand attack by salt spray and damp/humid atmospheres, particularly where extensive storage is required. Shield passes Test No. 8 Method A Def 68-10/2 Annex C which requires no corrosion after 100 hours at 20oC, UK CEGB report C19/250/A 1437 also confirms Arrow Shield as passing standard.Shield优异持久的防锈功能在潮湿的气候和海水的侵袭等恶劣环境下,表现更为显著。Shield通过了英国国防Def 68-10/2 Annex C 标准,在20 摄氏度100小时持续的盐雾喷洒下,被测的铁片没有锈蚀。 英国电力公司的 C19/250/A 1437 报告再次证实了Shield达到这个水平。Film Forming Properties防锈保护膜In order for correct corrosion prevention, a continuous homogeneous film must remain. The above CEGB test showed the film to be stable for the maximum duration of the test. This duplicated DEF 68-10/2 and DEF 2000 Method 23.要达到好的防锈效果,金属表面必须长期有一层完全均匀无损、附着力强的保护薄膜。Shield在被测金属表面形成的保护膜,在上述的整个实验过程中,并不因盐雾的喷洒而消失,从而起到了持久的防锈作用。Lacquer Forming Properties漆状沉淀When determined according to Test 9b DEF 68-10/2 at 150oC by CEGB, Shield showed weight of lacquer deposited on standard test panel to be 6.4 mg (less than 20 mg is acceptable).根据英国国防9b DEF 68-10/2标准,在150摄氏度下,Shield留在实验铁片上的漆状沉淀仅为6.4毫克,(标准的接受度是不超过20毫克)。Metal Corrosion Prevention混合金属防锈Of particular relevance to industrial situations especially those which are involved in harsher climates, e.g. marine, offshore industries, is Shields ability not only to prevent corrosion on standard mild or cast steels but also to deny attack where dissimilar metals are in contact. It is in this area that Shield has proved superior to other products which are intended for routine maintenance and are therefore rarely examined closely in this regard.Shield confers much better corrosion resistance than other soft film lubricants to non ferrous/ferrous systems e.g. aluminium and galvanised articles. This phenomena is especially important when plates or sheet steel are stacked in contact with each other and where salt induced crevice corrosion is a problem e.g. prevention of corrosion in 400 KV transmission lines manufactured from Aluminium, Steel and Zinc Wires in close combination. Shield不仅在恶劣的环境下,如海事作业等,提供常用钢材的持久防锈,而且可以抑制不同材质的金属间由于电解质水溶液的浓度差或者溶解氧量之差等等而构成局部电池从而被加速的腐蚀。这一功能是一般普通防锈剂所不具备的。Shield对混合金属,例如镀铝和镀锌的防锈功能会比其他普通的软膜防锈剂强。当大量不同材质的金属堆积存放在一起时,或在有缝隙腐蚀的可能下,Shield的这种抑制电解作用、防止锈蚀的功能就尤为重要,比如Shield被用于由铝、钢和锌组合而成的高压400KV电缆的防锈。Section 16 cont/dSHIELDAcid Fume Resistance防酸作用Another important practical property is Shields excellent resistance against sulphur dioxide, acetic and formic acid fumes. This is of major concern when packing steel articles for transportation in wooden crates.This remarkable effects have been well documented by (i) UK Department of Trade - Corrosion of metals by wood (ii) Corrosion of metals and their protection in atmosphere containing organic acid vapours - Donovan & Stringer. Arrow Technical Services can provide further details for customers on request.In addition, corrosion by condensed sulphur dioxide from chimneys or gas flares etc. can cause severe long term corrosion problems. In all cases above Shield has proved superior to the more conventional soft film lubricants described earlier.Shield另一重要功能是良好的抗酸性,尤其是各类酸液如二氧化硫、乙酸和甲酸的气体。英国的交通部有详细的纪录,有关钢材置放于木箱内作长途运输,钢材会因木料产生的酸液或因酸雨而腐蚀,使用Shield于钢材上就能防止这类腐蚀的发生,在各项抗酸测试中,Shield的性能明显优于其他软膜防锈剂。Water Displacing Properties and Reclamation of Shield from Dip-tank situations.排水功能Shield passes IP 178 Method B modified to suit requirements of PX24 in which a test panel prepared according to DEF 2000 Method 25 must be completely wetted out.In practical situations where corrosion prevention is to be carried out after derusting, acid descaling etc., followed by water rinsing; it is essential that any water carry-over quickly deposits at the dip-tank base, in order that subsequent articles are not affected by adverse emulsions etc. In the pressure testing of valves for North Sea operations this is most important, ensuring that Shield can by recycled, stored and be used many times as a combined pressure fluid/corrosion preventive.Significant also in this category is Shields use as a de-watering fluid on electrical/telecommunication equipment where ignition of control systems must restart immediately when cleared of water. Shield已通过了英国国防DEF2000/25,测试标准PX24,实验方式IP178/B的排水标准。在实际操作过程中,一般先对器件除锈或酸洗除垢,用清水冲洗后再放到槽中涂上防锈液。这就必须要求随带的水份会很快沉到槽底,以避免随后浸入防锈槽中的器件被不良乳化。Shield优良的排水性就可以做到这一点,因此槽中的防锈液可以被反复使用。英国北海钻井油田阀门的压力测试就利用Shield这一特性,用它代替常用的压力测试液,不但可以多次的重复使用,并且在减压排液后,阀门就可以直接包装库存或寄出而不必再涂上防锈液。由于Shield优异的排水功能,在电机设备或通讯器材的点火控制系统必须在短时间内恢复使用的情况下,可以将Shield作为排水剂使用。Effects on Rubbers and Plastics The effect of Shield is governed by its carrier solvent (white spirit). Any attack on plastics or rubbers is negligible and is well documented. Independent testing of Shield by UK Automobile Association Engineering Services indicates no effect after one weeks immersion of a wide variety of rubbers and plastics in Shield e.g. polyethylene, nylon, Bakelite, PVC, polypropylene nitrile and butyl rubbers. Natural rubbers are less resistant and therefore the most sensitive gasket materials require on-site testing. The recent introduction of less chemically resistant plastics makes the use of Shield in electrical situations more important since conventionally based electrical cleaners using 1,1,1 Trichloroethane seriously affect delicate plastics e.g. polycarbonates.Shield的独特配方不会腐蚀橡胶和塑料。英国汽车工程服务协会作过独立测试,将不同材质的塑料和橡胶浸泡在Shild中一个星期,如聚乙烯、尼龙、电胶、PVC、聚丙烯腈和丁基橡胶等,证明Shield对这些材料都没有腐蚀。天然橡胶最为敏感,建议使用前先作测试。目前在电机设备领域引进采用的抗化学腐蚀较弱的塑料材料使Shield的使用范围更广,因为很多传统的产品严重影响了这些精密的橡胶材料,如聚碳酸酯纤维。WHERE TO USE用途Shield may be used in any industry where short term corrosion prevention and/or water displacement is required, both in the electrical and mechanical engineering environment.Shield可以用于各个工业行业,如电子电机和机械工程领域的防锈、润滑、防潮等。HOW TO USE使用方法To achieve the performance outlined in the previous sections of this report, Shield must be ap
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