彩钢板的腐蚀破坏原因与如何判断质量好坏

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一、彩钢板腐蚀损坏原因分析

1。屋顶彩钢板的严重腐蚀是高温气流与氧硫腐蚀共同作用的结果。腐蚀速率增加的主要原因是车间顶板局部环境中二氧化碳浓度过高。建议在彩色钢板表面喷涂防锈漆或集风材料，改进生产工艺和工艺，定期检查和在线检查。

2。生产车间不锈钢屋顶多处腐蚀严重。局部腐蚀穿孔、开裂，上部顶板腐蚀面积较大。不锈钢屋顶外表面有许多凹坑和大面积的均匀腐蚀，弯曲处的腐蚀最为严重。如图2所示，一些弯曲穿透并形成裂缝，特别是在排气烟附近。在道路和大门上方的屋顶边缘，不锈钢板在许多地方被腐蚀和剥落，如图所示。近距离观察到彩钢板蓝色涂层无明显腐蚀。结果表明，涂层也发生了老化、开裂、起泡和脱落等现象。腐蚀区越近，老化开裂程度越明显。

3。生产车间露天燃煤采暖过程中产生的高温空气通过屋顶生锈的裂缝、简易的排气管和附近的窗户排出。用场发射扫描电镜观察了几种腐蚀严重的不锈钢板。从图3可以看出，内表面比外表面腐蚀更严重，但内表面主要为均匀腐蚀，点蚀坑较少，平均腐蚀深度较大，外表面整体腐蚀略轻，但点蚀坑较多。局部腐蚀特性，且局部点蚀深度或裂纹深度较大。在个别位置，外表面锈层的硫含量很高。外表面的硫含量应是外表面二氧化硫水溶液浓度的结果。浓缩二氧化硫水溶液的值降低，腐蚀性增强。

二、是如何判断 彩钢板的质量
彩钢板在社会上的应用越来越广泛。它在新建筑中占有重要的地位，受到人们的关注和认可，如活动板房。因此，下面的结果是如何在许多彩色钢板中找到一种优良的彩色钢板。接下来，让我们来看看小编总结的彩色钢板鉴别技术。
1。首先，我们要反思一下 彩钢板的质量认证，以及是否有相关的检验标准。在购买前调查公司在市场上的声誉。最好停止对彩钢板消费者工厂的现场调查，了解公司的环保设备情况，以及是否在正常运行中。
2。我们只能通过价格来了解 彩钢板的质量和质量。每件事都是一分钱换一分钱。在比较彩钢板的质量时，价格只是其中的一个，不必过分注重价格。但当一种彩钢板的价格比其他钢板低得多时，必须考虑购买的敌人。
3。观察暴露在外的钢材，如横截面，是否能结晶出细小、灰色、黑色和杂质。假设截面是细晶的，质量是很好的。观察底板厚度和腹膜厚度。

4。如果彩钢板被手指或硬物撞击，材质较好的彩钢板的金属声会越来越大。如果假定彩钢板材质较差，声音会变钝，金属声音不清晰。

1. Causes of Corrosion and Damage of Coloured Steel Plates

1. The serious decay of roof color steel plate is the result of the combined action of high temperature air flow and oxygen and sulfur decay. The main reason for the increase of corrosion rate is the super high concentration of CO2 in the local environment of workshop roof. It is suggested to spray rust-proof paint or vein-gathering material on the surface of color steel plate, improve the production process and process, and do regular inspection and online inspection.

2. The stainless steel roof of the production workshop is severely corroded in many places. Local corrosion has been perforated and cracked, and the corroded area of the roof above is larger. There are many pits and large areas of uniform corrosion on the outer surface of the stainless steel roof, and the corrosion in the bend is the most serious. Some of the bends penetrate and form cracks, as shown in Figure 2, especially near the exhaust smoke. On the roof edge above the road and gate, the stainless steel plate is corroded and peeled off in many places, as shown in the figure. The blue coatings of color steel sheets without obvious corrosion were observed at close range. It was found that the ageing, cracking, foaming and shedding of the coatings had also occurred. The more close to the corrosion area, the more obvious the ageing cracking degree was.

3. The high temperature air generated by the open coal-fired heating process in the production workshop is discharged through the rusted cracks in the roof, the simple exhaust pipe and the nearby windows. Several stainless steel sheets with serious corrosion were observed by field emission scanning electron microscopy. From Figure 3, it can be seen that the inner surface is more seriously corroded than the outer surface, but the inner surface is mainly uniformly corroded, with fewer pitting pits, more average corrosion depth and slightly lighter overall corrosion on the outer surface, but with more pitting pits and local corrosion characteristics, and the local pitting depth or cracking depth is larger. The sulphur content of the rust layer on the outer surface is very high at individual locations. The sulphur content on the outer surface should be the result of the concentration of sulphur dioxide aqueous solution on the outer surface. The value of the concentrated sulphur dioxide aqueous solution decreases and the corrosiveness is stronger.

Second, how to judge the quality of color steel plate

Colored steel plate is more and more widely used in society. It occupies an important position in new buildings which are concerned and accepted by people, such as movable panel houses. So the following result is how to find an excellent colored steel plate in many colored steel plates. Next, let's look at some techniques of distinguishing colored steel plate summarized by Xiaobian.

1. First of all, we should reflect on the quality certification of color steel plate, and whether there are relevant inspection standards. Investigate the company's reputation and reputation in the market before it is purchased. It's better to stop on-the-spot investigation to the consumer factory of color steel plate to see how the environmental equipment of the company is and whether it is on track.

2. We can know the quality and quality of coloured steel plate only through price. Everything is a penny for a penny. When comparing the quality of coloured steel plate, price is only one of them, and it is not necessary to pay too much attention to price. But when the price of one kind of coloured steel plate is much lower than that of the others, the enemy who wants to buy it must be considered.

3. Observe whether the exposed steel, such as cross-section, can crystallize fine, gray, dark and impurities. Assuming that the section is fine crystalline, the quality is excellent. The thickness of basal plate and peritoneum were observed.

4. If the color steel plate is struck with finger or hard object, the metal sound of the color steel plate with better material is louder and louder. If the material of the color steel plate is assumed to be worse, the sound will be dull and the metal sound is not clear.