ISO12944在钢结构防腐方面的应用
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钢结构的防腐蚀设计及技术探讨摘要:钢结构的防腐涂装技术也越来越受到各方面的关注,各种新技术、新工艺和新产品被广泛运用于钢结构防护工程,耐腐蚀、耐候性和施工性能皆佳的涂装配套体系也得到广泛地应用。
本文从钢结构的防腐方法出发,探讨钢结构腐蚀防护方案的设计步骤,以期为钢结构的腐蚀防护实践提供参考。
关键词:钢结构防腐设计技术一、钢结构的防腐方法(1)钢材本身防腐蚀,即采用具有抗腐蚀能力的耐候钢。
(2)长效防腐蚀方法,即采用热镀锌、热喷铝(锌)复合涂层进行钢材表面处理,使钢结构的防腐蚀年限达到20~30 年,甚至更长。
(3)涂层法,即在钢结构表面涂(喷)油漆或其他防腐蚀涂料,其耐久年限一般为5~10年。
(4)对水下或地下钢结构采用阴极保护。
阐述长效防腐蚀方法和涂层法1.长效防腐蚀方法1.1 机加件的镀铬、镀锌、镀镍等方法。
在建筑装饰行业的埋件、转接件,支撑件大部分以热浸镀锌为主,当钢板厚度小于3mm且大于等于1.5mm时热浸镀锌层最小厚度55μm,当钢板厚度小于6mm 且大于等于3mm 时热浸镀锌层最小厚度70μm,当钢板厚度大于6mm 时,热浸镀锌层最小厚度85μm。
此时热浸镀锌的防腐效果较好,但钢件的结构尺寸大小受到一定的限制。
1.2 焊接钢结构件的直线度和平面度要求较严不能进行热浸镀锌以免发生变形。
1.3 漏镀件或现场焊接使镀锌层遭到破坏应采取热喷涂锌或刷2遍环氧富锌底漆+1遍丙烯酸聚氨脂铝银浆面漆,热喷涂锌层的厚度、漆膜的厚度应等于原热浸镀锌层的厚度。
1.4 钢件表面热喷涂金属。
热喷涂金属锌、铝及锌铝合金是一种长效防腐方法,一次涂层厚度可以达到100μm以上,附着力强, 在腐蚀环境比较严重的环境下需要在金属涂层的表面进行孔隙的封闭处理,这样可以达到长效的防腐目的。
一般采用环氧树脂涂料或聚乙烯树脂涂料进行表面孔隙的封闭处理。
热喷涂金属使用等离子喷枪时,劳动条件比较差,要求钢件表面处理质量高。
2. 涂层法2.1 钢件常用的防腐漆有:油性酚醛涂料、醇酸涂料、高氯化聚乙烯涂料、氯化橡胶涂料、氯磺化聚乙烯涂料、环氧树脂涂料、无机富锌涂料、有机硅涂料、过氯乙烯涂料、丙烯酸聚氨脂。
德国标准1998年6月油漆保护系统对钢结构的防腐蚀保护第1部分:简介(ISO 12944-1:1998)DINEN ISO 12944-1ICS 87.020; 91.080.10关键字:油漆层,防腐蚀,钢结构本标准和DIN EN ISO 12944-2 1998版本代替DIN 55928-1, 1991年5月版本。
欧洲标准EN ISO 12944-1: 1998是DIN 标准。
前言本标准出版发行符合CEN/TC 139 决议。
且本标准没有变更,纳入欧洲标准。
参与编制本标准的德国机构包括油漆标准委员会和技术委员会。
与国际标准EN对应的DIN标准如下:ISO 标准DIN标准ISO 4628-1 DIN ISO 4628-1*)ISO 4628-2 DIN ISO 4628-2*)ISO 4628-3 DIN ISO 4628-3*)ISO 4628-4 DIN ISO 4628-4ISO 4628-5 DIN ISO 4628-5修订DIN 55928-1, 1991年5月版已被修订,现在已被DIN EN ISO 12944-1 和DIN EN ISO 12944-2两个标准代替。
先前版本DIN 55928:1956-11, 1959-06x; DIN 55928-1: 1976-11, 1991-05带有*) 的标准表示现在处于草稿阶段。
欧洲标准EN ISO 12944-1 1998年5月ICS 87. 020关键词: 油漆涂层, 防腐蚀, 钢结构油漆和清漆油漆保护系统对钢结构的防腐蚀保护第1部分:简介(ISO 12944-1:1998)前言《国际标准ISO 12944-1: 1998 油漆和清漆-油漆保护系统对钢结构的防腐蚀保护,第1部分:简介(ISO 12944-1:1998)》根据国际组织ISO/TC35‘油漆和清漆’章节编制用于实现标准化。
此标准已被技术委员会CEN/TC 139 ‘油漆和清漆’章节采用,命名为DIN,做为欧洲标准。
解析ISO12944标准(一、标准介绍)ISO 12944 Paints and varnishes —Corrosion protection ofsteel structures by protective paint systems(色漆和清—防护涂料体系对钢结构的防腐蚀保护)是防腐蚀涂料与涂装领域一个非常有用的标准。
笔者曾组织同行于2008年将该标准共8个部分译成了中文。
2014年,中国涂料与颜料标准化委员会已将其转化为国标,标准号为GB/T 30790。
这个标准对于那些从事涂料防腐蚀工作的业主、设计人员、咨询顾问、涂装承包商、涂料生产企业等都非常有用。
因此,笔者拟在此公众号中分期进行介绍。
朋友们可在文后留言参与讨论和提问。
ISO(国际标准化组织)是各个国家的标准化机构(ISO成员团体)共同组织的世界性联合机构。
国际标准的制订工作由ISO技术委员会负责。
每个成员团体都有权派代表参加所关注课题的技术委员会,各政府性或非政府性的国际组织,凡与ISO有联系的,也都参与这项工作。
ISO12944国际标准是由ISO/TC35技术委员会.色漆和清漆-钢结构防腐蚀涂料系统.SC14分委会制订的。
ISO12944《色漆和清漆-防护涂料体系对钢结构的防腐蚀保护》中总共包括以下部分内容:第1部分:总则第2部分:环境分类第3部分:设计内容第4部分:表面类型及表面处理第5部分:防护涂料体系(注:这部分在2007年进行了修订)第6部分:实验室性能测试方法第7部分:涂装工作的实施和监管第8部分:新建和维修防腐技术规格书的制订简介未经保护的钢材在大气、水和土壤中会因腐蚀而损坏。
因此,为了避免腐蚀损坏,在钢结构服役期间需采取一些防腐蚀保护措施。
有很多种不同的方式可以用于保护钢结构免遭腐蚀。
ISO12944 针对的是采用涂料体系和涂覆层来保护。
该标准的各部分内容的宗旨,都是为了获得适当的、成功的钢结构防腐蚀保护效果。
其它的一些防腐蚀措施也可能是有效的,但需要各相关方达成一致意见。
解析ISO12944标准(⼆、腐蚀环境分类)参看解析ISO 12944标准(⼀、标准介绍)1.范围1.1 ISO 12944 这⼀部分研究钢结构所处的主要腐蚀环境的等级分类和这些环境的腐蚀性。
包括:—基于标准样本的质量损失和厚度损耗,定义了⼤⽓环境腐蚀性级别,也描述了钢结构所处的典型⾃然⼤⽓环境,对腐蚀性评估给出了建议。
—描述了钢结构浸泡在⽔中和埋于⼟壤中的不同腐蚀性级别。
—给出了⼀些会导致腐蚀加重的特殊腐蚀应⼒或空间的相关信息,这种情况下对防护涂料体系的性能要求更⾼。
特殊环境或特种腐蚀性类别下的腐蚀应⼒情况,是调整防护涂料体系选择的必要参数。
1.2这⼀部分的ISO 12944并不包含那些含有特殊⽓体(例如:化学品⼯⼚或冶炼⼚的周围)的⼤⽓环境分类。
2.参考的标准规范下列标准通过本标准的引⽤⽽成为标准不可缺少的⽂件。
在本标准出版时,这些引⽤的标准版本都是有效。
但所有的标准都会被修订,⿎励各⽅讨论这些标准的最新版本在ISO 12944继续引⽤的可能性。
IEC和ISO的成员对⽬前有效的国际标准保持着登记。
ISO 9223:1992,⾦属与合⾦腐蚀—⼤⽓腐蚀性—分类ISO 9226:1992,⾦属与合⾦腐蚀—⼤⽓腐蚀性—为了腐蚀性评价⽽进⾏的标准样本的腐蚀速率的测定ISO 12944-1:1998,⾊漆与清漆—防护涂料体系对钢结构的防腐蚀防护—第1部分:总则EN 12501-1:—⾦属材料的防腐蚀保护—⼟壤中的腐蚀可能性—第⼀部分:总则3.术语和定义在ISO 12944这部分中,除了ISO 12944-1已给出的⼀些,以下术语被应⽤。
注意:有些定义是取之于ISO 8044:1989,⾦属和合⾦腐蚀—词汇中的说明。
3.1 腐蚀性(corrosivity):在某个腐蚀体系中,环境造成腐蚀的能⼒[ISO 8044]。
3.2 腐蚀应⼒(corrosionstresses):促进腐蚀的环境因素。
3.3 腐蚀体系(corrosionsystem):由⼀种或多种⾦属和所有影响腐蚀的环境各部分因素组成的体系[ISO 8044]。
ISO12944是规定钢结构的涂层防腐系统的标准ISO 12944是规定钢结构的涂层防腐系统的标准(Corrosion protection of steel structures by protective paint systems),为工程师、工程顾问、工程承包方以及涂层的供应商提供了全面的有关涂层防腐的指导。
ISO 12944 共分为8 个部分定义了涂装系统的“防腐年限(Durability)”定义了环境的“腐蚀等级(Corrosion Categories)”为选择涂装系统提供了指导表示为 3 个年限低低(Low) 2 至 5 年中(Medium)5 至15 年高(High) 大于15 年C4 H表示腐蚀环境为高盐度的工业地区和中等盐度的海岸地区,比如化工厂,游泳池,海船和船厂等在这种环境下,仅靠电镀或静电喷涂是难以达到15年以上的防腐寿命的,根据ISO12944第 5 部分–防护涂装系统可以进行涂层系统的设计厚度/ 预期防腐年限类别 DFT 范围(μm) (含富锌底漆)最小dft (μm) 预期防腐年限C2 80 低(2-5 年)80 –120 中(5-15 年)160 –200 80 高(>15 年)C3120 –160 低(2-5 年)160 –200 80 中(5-15 年)200 –240 160 高(>15 年)C4 160 –200 160 低(2-5 年)200 –240 200 中(5-15 年)240 –320 240 高(>15 年)C5IC5M 200 低(2-5 年)160 –240 160 中(5-15 年)280 –400 280 高(>15 年)一般涂层系统由底漆,中层漆和面漆三道涂层组成,在此腐蚀环境下,通常选用的油漆有:富锌底漆,环氧中层漆盒聚氨酯面漆。
1. ScopeThis International Standard specifies requirements for thickness corrosion resistance and mechanical and physical properties of non-electrolytically applied zinc flake coatings steel fasteners with metric threads.If applies to both coating with of without chromate.If fasteners with metric thread with pitch below 0.8mm ( 〈 MS )or fasteners with small internal drives or cavities are to be coated. special agreement between supplier and purchaser is required.Coatings according to this international Standard may also be applied to steel screws which from their own mating threads sush as wood screw, self tapping screws,self drilling screw,thread cutting screws and thread rolling screws as well as to non-threaded steel parts sush as washers and pins.They may be similarly applied to steel fasteners with other types of thread.Coatings according to this international Standard can be supplied with integral lubricant and/ or with an externally added lubricant.2. Normative referencesThe following normative documents contain provisionswhich,through reference in thistest,constitute provisions of this international Standard. At the time of publication,the editions indicated were valid. All normative documents are subject to revision. and parties to agreements based on this international Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standard.ISO 898-1 :1989Mechanical properties of fastener . Bolts, screws and studs ISO 1502 :1978ISO general purpose metric screw thread-GaugingISO 1463 :1982Metallic and oxide coatings-Measurement of coating thickness-Microscopical methodISO 6988 : 1085Metallic and other non-organic coatings-Sulfur dioxide test with general condensation of moisture ISO 8991 : 1986 Designation system for fastenersISO 9227 : 1990Corrosion tests in artificial atmospheres-salt spray testISO/DIS 15330 : 1997Fasteners-Preloading test for the detection of hydrogen embitterment-Parallel bearing surface method3. DefinitionNon -electrolytically applied zinc flake coating( with or without integral lubricant)A coating which is produced by applying on the surface of a fastener a zinc flakedispersion,possibly with addition of aluminum flakes .in a suitable medium which under influence of heat(curing)generates a bonding of the flakes and between flakes and the substrate thus forming a sufficiently electrically conduction inorganic surface coating to ensure cathode protection. The coating may or may not contain chromate.4. GeneralIt is a characteristic df this type of coating that no hydrogen which could be absorbed by the parts is generated during the coating process. Therefore, by using pretreatment cleaning methods which do not generate nascent hydrogen (for example blast cleaning),there is not risk of hydrogen embitterment form the surface preparation procedure.If cleaning methods are applied which could lead to hydrogen absorption (such as cleaning).then for fasteners which 8 hardness above 365 Hv in process control shall be conducted to ensure that the process with regard to hydrogen embroilment is under control. This can be done by a preload test according to ISO 15330However it should be noted that a non electrolytically applied zinc flake coating has a high permeability for hydrogen which during the curing process, allows effusion of hydrogen which may have been absorbed before the coating process.5.Dimensional requirements and testingThe applicability of coating to ISO metric threads is limited by the fundamental deviation of the threads concerned as given in table 1 and, hence, by the pitch and tolerance positions. The coating shall not cause the zero line(basic size)to be exceeded in the case of external threads, nor shall it fall below in the case of internal threads. this means that for an internal thread oftolerances position H, a measurable coating thickness can only be applied to the thread if the tolerance zone is not taken up to the zero line(basic size).After coating, ISO metric screw threads shall be gauged according to ISO 1502 with a GO-gauge of tolerance position h for external threads and H for internal threads. When gauging the coated thread a maximum torque of 0,001 d3. (N.m)is acceptable, where d is the nominal thread diameter in min.Other product dimensions apply only before coating.NOTE Care should be exercised where relatively thick coatings may affect dimensions with small tolerances such as internal drives or small nuts, in these cases agreements shall be made between the supplier and the purchaser.Table 1 - Theoretical upper limits of coating thickness for ISO metric threadsIf a minimum coating thickness( t min)is required in order to achieve a specified corrosion resistance (see clause 6)the range of the coating thickness has to be taken into consideration which is approximately the same as the minimum coating itself. Therefore the maximum coating thickness to be expected is twiceas much as the required minimum coating thickness see table 2. The minimum fundamental deviation required for a specified minimum coating thickness which is 4 t max (or 8 t min )is also given in table 2.Table 2 -Coating thickness and required fundamental deviationIf for a given pitch the fundamental deviation as given in table 1 is not sufficient to allow for the required minimum coating thickness then.--either the tolerance position of the thread has to be changed ( e.g.f instead of g )--or the tolerance within the given tolerance field has to be restricted such that the threadhas to be manufactured at the upper limit for the internal thread or at the lower limit external thread of the respective tolerance.Required minimum local coating thickness to achieve specified corrosion resistance are given in table 3.If the minimum local coating thickness is specified (see table3) it may be measured by magnetic or X ray techniques. In the case of dispute the referee test shall be the microscopical method as described in ISO 1463. The surfaced to be used for thickness measurements are those given in figure1 Measuring areaFigure 1 --Measuring area for coating thickness measurement on threaded fasteners6 Testing of corrosion protectionThe neutral salt spray test according to ISO9227 is used to evaluate the quality of the coating. The test is applied to coated parts which are in the as delivered condition. Performance in the test cannot be related to corrosion protection behavior in particular service environments.NOTE In normal cases the coating shall be defined by specifying the test duration for neutral salt spray test according to table 3. see example 1 in clause 9.After the neutral salt spray test with a test duration according to table 3 there shall be no visible ferrous(red) corrosion attack on the base metal.Table 3 -- Test duration ( Neutral salt spray test )7. Mechanical and physical properties and testing7.1GeneralThe coating process shall not adversely influence the mechanical and physical properties of fasteners as specified in the relevant ISO Standards.Consideration shall be given by the manufacturer supported by testing if necessary. to determine whether the curing temperature and duration as specified by the coater are suitable foe the particular type of fastener to be coated.7.2 AppearanceThe colour of the coating is silver grey. The coated fastener shall be free from blisters, localized excess coating and uncoated areas which may have adverse effects on corrosion protection and fitness for use.Special techniques may be necessary to avoid excess coating or uncoated areas with parts such as washers. nuts and recess drive screw.7.3 Temperature resistanceAfter heating the coated fasteners for 3 hours at 150℃(part temperature) the corrosion resistance requirements as specified in clause 6 shall still be met.7.4 DuctilityAfter loading the coated fastener with the proof load specified in ISO 898-1 the corrosion resistance as specified in clause 6 shall still be met in areas other than where thread engagement has occurred. This requirement applies to bolts. screws and studs with metric thread only.7.5 Adhesion/ cohesionIf an adhesive tape with an a dhesive strength of (7 N ± 1 N) per 25 mm width is pressed by hand on the surface and is subsequently pulled off jerkily and perpendicularly to the surface.the coating shall not be peeled off the base metal. Small amounts of the coating material sticking on the tape are acceptable.7.6 Cathodic protectionThe cathodic protection capability of the coating can be tested by making the salt spray test according to be clause with a specimen which is scratched to the base metal, the scratch having a width of max.0.5 mm. After the salt spray rest of 72 h there shall be no red rust in the scratched area.7.7 Torque/tension relationship for coatings with integral lubricant or externally added lubricant The requirements for torque/tension shall be agreed between the manufacturer and purchaser.8. Applicability of tests8.1 GeneralAll requirements given in the clause 5, 6 and 7 apply as far as they are general characteristics of the coating or are separately specified by the customer. The tests included in clause 8.2 shall be carried out for each lot of fasteners. The tests included in clause 8.3 are not intended to be applied for each fastener lot, but are used for in process control.8.2 Tests mandatory for each lot--Gauging of threads ( 5 )--Appearance ( 7.2 )--Adhesion/cohesion ( 7.5 )8.3 Tests to be made for in process control--Neutral salt spray test (6)--Temperature resistance ( 7.3 )--Ductility ( 7.4 )--Cathodic protection ( 7.6 )8.4 Tests which are only to be made when specified by the customer-- Coating thickness ( 5 )--Torque/tension relationship for coating with integral lubricant ( 7.7 )9. DesignationThe designation of the coating shall be added to the product designation in accordance with the designation system specified in ISO 8991 using the symbol flZn for non-electrolytically applied zinc flake coating, a figure for the required duration of salt spray test in hours and, if necessary,the specification for a coating with chromate(yc) or without chromate (nc).EXAMPLE 1 Hexagon head bolt ISO 4014 - M12 X 80 - 10.9 with a non-electrolytically applied zinc flake coating(flZc), with a required duration of salt spray test of 480 h:Hexagon head bolt ISO 4014 - M12 X 80 - 10.9 - flZn - 480h if a coating with integral lubricant is required,the letter L shall be added to the designation after the symbol for the zinc flake coating:Hexagon head bolt ISO 4014 - M12 X 80 - 10.9 - flZnL - 480h if a coating with a subsequent lubrication(external lubricant) is required, the letter L shall be added at the of the designation: Hexagon head bolt ISO 4014 - M12 X 80 - 10.9 - flZn - 480h - LEXAMPLE 2 Hexagon head bolt ISO 4014 - M12 X 80 - 10.9 with a non-electrolytically applied zinc flake coating without chromate flZnnc, with a required duration of salt spray test of 480 h:Hexagon head bolt ISO 4014 - M12 X 80 - 10.9 - flZnnc - 480hEXAMPLE 3 Hexagon head bolt ISO 4014 - M12 X 80 - 10.9 with a non-electrolytically applied zinc flake coating with chromate flZnyc, with a required duration of salt spray test of 480 h:Hexagon head bolt ISO 4014 - M12 X 80 - 10.9 - flZnyc - 480h10. Ordering requirementsWhen ordering threaded parts to be coated according to this International Standard, the flowing information shall be supplied to the coater:a) THe reference to this International standard and the coating designation(see clause 9).b) The matrial of the part and its. condition, e.g. heat treatment, hardness ororder properties, which may be influenced by the coating process..c) Thread tolerances if different from the product standardd) Performance(torque/tension, coefficient of friction, sealing) and the testmethods for integrally lubricated or supplementary lubricated coating shallbe agreed between the manufacturer and purchaser.e) Tests to be carried out, if any(see clause 8)f) Sampling。
iso12944防腐等级cx
ISO12944防腐等级CX
## 什么是ISO12944防腐等级CX
ISO12944防腐等级CX是国际标准化组织针对钢结构物的防腐涂层等级之一,其中CX等级代表的是最高等级的特别严格的防腐涂层标准。
具有CX等级的涂层,可在恶劣的环境中保持其功能性和美观性,例如在海洋环境和高氯离子污染的地区等。
## CX等级的标准
CX等级的防腐涂层应当符合以下标准:
1. 涂层的粗糙度应该小于50微米,以确保涂层的覆盖率和附着力。
2. 涂层的厚度应当达到最小170微米,并且应在涂层表面均匀分布。
3. 使用的涂料应当是高性能的防腐涂料,例如环氧树脂。
4. 涂层的表面应该是完全平整的,没有任何的裂缝或空气孔隙,以确保涂层的完
整性和防腐性能。
## CX等级的应用
CX等级的防腐涂层通常应用在需要高度防腐能力的钢结构物上。
例如海洋平台、桥梁、石油储罐、油田设备等。
这些结构物通常会暴露在恶劣的气候和强烈
的化学物质中,因此需要CX等级的防腐涂层来保护其表面和延长使用寿命。
同时,CX等级的涂层也可以应用于一些重要的基础设施,例如医院和化学工厂等,以确
保其安全和稳定性。
## 结语
ISO12944防腐等级CX是目前最高等级的防腐涂层标准之一,其应用范围广泛,可在恶劣的环境中保持其功能性和美观性。
在建设过程中,需要注意使用高质量
的材料和专业的防腐涂层技术,以确保CX等级的防腐涂层能够发挥其最大的作用。
iso12944防腐等级
ISO 12944防腐等级是一种国际标准,用于评估对金属结构进行的防
腐保护的效果。
该标准将防腐保护分为四个等级,以便根据使用环境
和预期使用寿命为不同的金属结构选择合适的防腐等级。
第一等级是非暴露等级,适用于不受大气侵蚀和化学介质腐蚀影响的
结构,如室内设备和管道等。
第二等级是低暴露等级,适用于在短暂
时间内受到大气较轻度腐蚀的结构,如桥梁、屋顶和墙壁等。
第三等
级是中暴露等级,适用于在潮湿和腐蚀性大气环境下使用的结构,如
海上钻井平台和化工厂等。
第四等级是高暴露等级,适用于处于酸雨、海水侵蚀和极端气候等恶劣环境中的结构,如海洋油田和海水开采平
台等。
ISO 12944防腐等级采用了多种防护措施,包括金属和非金属涂层、
环氧树脂、喷涂聚氨酯和热浸镀锌等。
这些措施可以大幅度减少金属
结构受到腐蚀的风险,从而延长结构使用寿命、减少维护成本,并且
提高结构的安全性和可靠性。
在选择防腐等级时,应考虑因素包括结构所处的环境、结构的预期使
用寿命、外部气候条件、结构的作用和设计及结构的经济影响等。
正
确选择防腐等级可以最大限度地保护结构,同时在减少维护和设备更
换成本的同时,确保对环境有所保护。
总之,选择正确的ISO 12944防腐等级对保护金属结构非常重要,在不同工程环境中应根据工程需要选择相应的防腐等级。
防腐保护是一个长期的工作,需要经常检查和更新,以便使金属结构免受腐蚀和其他损坏的影响,让结构更加坚固、持久、稳定。
聚天门冬氨酸酯:聚天门冬氨酸酯可用标准的施工设备直接施工于金属表面,一道施工厚度150-250微米(6-10密耳),在中度腐蚀环境中(最高到C3,ISO12944-2)使用时,与两道漆施工相比,可以节约施工时间和劳动力成本。
基本介绍:聚天门冬氨酸酯可用标准的施工设备直接施工于金属表面,一道施工厚度150-250微米(6-10密耳),在中度腐蚀环境中(最高到C3,ISO12944-2)使用时,与两道漆施工相比,可以节约施工时间和劳动力成本。
聚天门冬氨酸酯是一种低VOC、高固含量的快干型底漆/面漆,同时提供优异的防腐保护和长效的保光保色性能-其他快干型、单道底漆面漆替代产品无法达到。
聚天门冬氨酸酯同样可以作为一种厚浆型,耐久性中间漆/面漆产品,施工于经认可的防腐底漆之上,在更加恶劣的腐蚀环境中使用,如ISO12944 C4和C5。
设计用途:聚天门冬氨酸酯尤其适用作为单道高性能面漆使用。
用作钢结构施工,减少涂层道数可以帮助提高生产量和生产效率。
快干和可提前搬运特征使其非常适合用于风塔、变压器、矿山设备和泵等对生产率和干燥时间要求较高的场合。
表面处理:聚天门冬氨酸酯所有待涂表面应清洁、干燥且无污染物。
涂涂覆前,所有表面应按照ISO 8504:2000标准进行评估和处理。
油和油脂应按照SSPC-SP1溶剂清理标准除去。
磨料喷砂喷砂清理至Sa2 (ISO 8501-1:2007) 或SSPC-SP6标准。
如果在喷砂清理与施工聚天门冬氨酸酯之间,已发生氧化现象,表面应再行喷砂清理至规定的图片标准。
喷砂清理过程暴露出来的表面缺陷,应打磨、填没或采用其它合适的方法进行处理。
建议表面粗糙度为50-75 微米(2-3 密耳)。
预涂有底漆的表面聚天门冬氨酸酯可以施工在经认可的防腐底漆之上。
聚天门冬氨酸酯该底漆表面应当干燥且无污染物,聚天门冬氨酸酯应在规定的覆涂间隔内施工(参见相关产品的产品说明书)。
破损的部位应当处理至规定的标准(如Sa2 (ISO 8501-1:2007)或SSPC-SP6)。