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彩涂板防腐措施

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彩涂板防腐措施

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山东彩涂板防腐措施_山东彩涂薄板_天物彩板

腐蚀是三种形式中最复杂、最具破坏性的一种。由于彩涂板的腐蚀发生在金属与环境(介质)的界面处,并产生化学或电化学反应,因此金属腐蚀防护的研究是其主要形式。其他材料防腐研究中比较困难的问题之一。金属材料的腐蚀分类通常包括以下类别:

(1)根据腐蚀环境:干腐蚀和湿腐蚀
(2)腐蚀机理:化学腐蚀、电化学腐蚀、物理腐蚀
(3)根据腐蚀形式的类型,点蚀和应力腐蚀开裂
(4)按材料分类的金属:《金属手册》中常用和实用的金属
(5)按适用范围:实际上是按腐蚀环境分类的特殊用途。
金属防腐蚀现象主要有(1)点和(2)点。(1)点干腐蚀属于化学机理,湿腐蚀属于电化学机理。点(3)到(5)属于点(1)和(2)的进一步分类。彩涂钢板的防腐蚀机理是通过涂层将基体与腐蚀介质隔离,防止基体表面发生化学或电化学反应。因此,我们要研究的最终防腐问题应该归结为涂层钢板基体表面的化学腐蚀和电化学腐蚀。
基于上述金属腐蚀机理,人们一直在寻找控制金属腐蚀的有效方法。经过长期实践,基本形成了以下几种误区:
(1)选择金属材料时,应尽量选择耐大气腐蚀性。
(2)表面保护涂层
(3)改变成分,加入缓蚀剂,抑制腐蚀过程。
(4)包装前防锈处理,贮存时保持干燥、清洁

(5)在结构设计中,尽量避免出现裂缝、沟槽等易积水、引起腐蚀应力断裂的地方。

Color coated steel plate is a kind of steel plate with organic coating. With excellent performance indicators, it has been widely used in recent years. The base plate of color steel plate is cold-rolled, hot-dip galvanized and galvanized. It is divided into single plate, composite plate and floor support plate. The following is a detailed description of color steel plate.
1. Bright color: No surface decoration, color galvanized steel anticorrosive coating for 10-15 years.
2. Easy installation: the construction period can be reduced by more than 40%.
3. Oxygen Index: (OI) 32.0 (Provincial Fire Products Quality Inspection Station).
(1) According to the corrosive environment: dry corrosion and wet corrosion
(2) According to corrosion mechanism: chemical corrosion, electrochemical corrosion and physical corrosion
(3) According to the types of corrosion forms, pitting corrosion and stress corrosion cracking
(4) Metals according to material: Common and practical metals in "Metal Manual"
(5) According to the scope of application: in fact, it is a special application classified according to the corrosive environment.
The phenomena of metal anticorrosion are mainly points (1) and (2) mentioned above. Dry corrosion at point (1) belongs to chemical mechanism while wet corrosion belongs to electrochemical mechanism. Points (3) to (5) belong to the further classification of points (1) and (2). The anticorrosion mechanism of color coated steel sheet is to isolate the substrate from the corrosive medium by using the coating to The base plate of color steel plate is cold rolled, hot galvanized and electrogalvanized. The coating types can be divided into polyester, silicon modified polyester, polyvinylidene fluoride and plastic sol. The surface state of color coated steel sheet can be divided into coated sheet, embossed sheet and printed sheet. The color coated steel sheet is widely used in building household appliances, transportation and other industries. For the roof walls and doors of industrial and commercial buildings, such as steel structure factory buildings, airports, warehouses and refrigeration, the color coated steel sheet is seldom used in civil buildings.
(1) When choosing metal materials, choose atmospheric corrosion resistance as far as possible.
(2) Surface protective coating
(3) Change the composition and add corrosion inhibitor to inhibit the corrosion process.
(4) Anti-rust treatment before packing and keeping dry and clean during storage
(5) In structural design, try to avoid cracks, grooves and other places which are easy to accumulate water and cause corrosion stress fracture.

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