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分享彩涂板的耐蚀性因素之一(基板种类)

返回列表 来源: 发布日期: 2019.11.19

分享彩涂板的耐蚀性因素之一(基板种类)

天物彩板专注彩板16年——新产品天物【粉末喷涂彩板】,彩板行业新革命更多彩板订购介绍等请拨打网站上方电话咨询

影响彩涂板耐腐蚀性能的因素很多,包括彩涂板的种类、厚度、种类、级别和厚度、使用环境条件、施工后的机械加工、运输、储存、施工、安装和维护等。今天我们主要谈的是基板、涂层类型和使用环境对彩涂板耐腐蚀性的影响!

耐腐蚀彩钢卷厂家_粉末喷涂彩板耐腐蚀么_天物彩板


基底类型
基材的耐腐蚀性主要包括:
A.裸板耐腐蚀B.成形后耐腐蚀C.切边牺牲保护
这三种特性随基底类型的不同而不同。
目前国内常用的有:
A.热镀锌钢板B.电镀锌钢板C.热镀锌铝钢板D.热镀锌合金钢板锌和铝在大多数大气环境中具有高稳定性。
锌会在腐蚀介质中形成薄而致密的腐蚀产物(氧化锌、氧化锌、碱性盐)。这些产品能屏蔽周围的介质,防止进一步腐蚀。此外,锌的电极电位比铁的电极电位负,属于阳极镀层。它具有自我牺牲的保护功能。在相同的环境条件下,其寿命与镀锌层的附着力成正比。增加镀锌层厚度可提高使用寿命。在一定的极限厚度下,热镀锌工艺相对容易实现。但由于工艺的限制,镀锌层厚度很薄,一般可达18G/m2,国内生产的双面镀锌层为15g/15g,不适合户外使用。
热浸镀铝锌是另一种常见的金属镀层,由于铝表面容易形成致密的氧化铝层,在相同的环境下,其耐蚀性是热浸镀的两倍以上。铝的氧化膜是非常稳定的,起隔离膜的作用。它还具有优异的抗硫化物性能。铝锌合金在其表面可获得粗大、致密、不溶于水的非活性氧化膜,从而防止进一步氧化。同时,由于铝锌合金的电位比锌慢,铝锌合金的电化学腐蚀速率比纯锌慢。同时,经过刮擦和剪切,锌在合金边缘提供牺牲阴极保护,大大提高了彩涂板的耐蚀性。
如何打造自己的【天物彩板】品牌一直是高端彩板定制领域关注的焦点。根据使用环境、设计寿命、结构造型和客户的独特需求,个性化定制可以满足客户的多样化需求,提高下游客户的竞争力。我们始终坚持“以质量为本,以信誉为本”的经营理念,致力于生产高品质环保节能彩板。我们的产品涵盖18个系列,包括PVDF彩钢板、PVDF彩钢板性能及应用、HDP高耐候彩钢板、SMP硅改性聚酯彩钢板、PE普通聚酯彩钢板、抗静电彩钢板、抗菌彩钢板、保温彩钢板,自洁彩板等

There are many factors that affect the corrosion resistance of the color coated plate, including the type, thickness, type, level and thickness of the coating, the environmental conditions for use, and the mechanical processing, transportation, storage, construction, installation and maintenance after construction. Today we mainly talk about the base plate, coating types and the use of environmental impact on the corrosion resistance of color coated plate!

Type of substrate
The corrosion resistance of the substrate mainly includes:
A. corrosion resistance of bare plate B. corrosion resistance after forming C. edge cutting sacrificial protection
These three properties vary with the substrate type.
At present, the commonly used ones in China are as follows:
A. hot dip galvanized steel plate B. electro galvanized steel plate C. hot dip galvanized aluminum steel plate D. hot dip galvanized alloy steel plate zinc and aluminum have high stability in most atmospheric environments.
Zinc will form thin and dense corrosion products (zinc oxide, zinc oxide, alkaline salt) with strong adhesion in the corrosion medium. These products shield the surrounding medium and prevent further corrosion. In addition, the electrode potential of zinc is negative than that of iron, which belongs to anode coating. It has the protection function of sacrificing itself. Under the same environmental conditions, its life is directly proportional to the adhesion of zinc coating. The service life can be increased by increasing the thickness of the zinc coating. In a certain limit thickness, the process of hot-dip galvanizing is relatively easy to achieve. However, due to the limitation of technology, the thickness of zinc coating is very thin, generally up to 18G / m2, and the domestic production is 15g / 15g double-sided, so it is not suitable for outdoor use.
Hot dip aluminizing zinc is another kind of common metal coating, because the aluminum surface is easy to form a dense alumina layer, in the same environment, its corrosion resistance is more than twice that of hot dip galvanizing. The oxide film of aluminum is very stable and plays the role of isolation film. It also has excellent anti sulfide properties. Aluminum zinc alloy can obtain thick, dense and water-insoluble non active oxide film on its surface, thus preventing further oxidation. At the same time, because the potential of aluminum zinc alloy is slower than that of zinc, the electrochemical corrosion rate of aluminum zinc alloy is slower than that of pure zinc. At the same time, after scratching and shearing, zinc provides sacrificial cathodic protection at the edge of the alloy, which greatly improves the corrosion resistance of the color coated plate.
How to build its own brand tianwu color plate has always been focused on the field of high-end color plate customization. According to the use environment, design life, structural molding and the unique needs of customers, personalized customization can meet the diversified needs of customers and improve the competitiveness of downstream customers. We always adhere to the business philosophy of "based on quality and committed to credit", and are committed to producing high-quality environmental protection and energy-saving color plates. Our products cover 18 series, including PVDF color plates, PVDF color coated steel coil performance and application, HDP high weather resistant color plates, SMP silicon modified polyester color plates, PE ordinary polyester color plates, antistatic color plates, antibacterial color plates, thermal insulation color plates, self-cleaning color plates, etc

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