2种防腐技术+15年防护期！济南轻钢防腐，热镀锌vs涂装，一看就会

　　2 anti-corrosion technologies+15 year protection period! Jinan light steel anti-corrosion, hot-dip galvanizing vs coating, it's easy to see at a glance

　　盖济南轻型钢结构房的朋友，大多只关注强度、造价和工期，却容易忽略一个关键问题——防腐！济南属于温带季风气候，夏季多雨潮湿、冬季多雪严寒，空气中的水汽、盐分容易侵蚀轻钢构件，要是防腐没做好，用个三五年就生锈、脱皮，不仅影响房屋美观，还会削弱结构强度，缩短使用寿命，后期维修起来又费钱又费力。今天就给大家唠透济南轻型钢结构的两种核心防腐技术，用大白话+实打实的数据，把施工细节、优劣差别讲清楚，不管是盖房施工，还是后期维护，看完都能少踩坑，关注我，干结构相关的事儿，啥都能给你讲明白。

　　Friends who build lightweight steel structure houses in Jinan often only focus on strength, cost, and construction period, but tend to overlook a key issue - corrosion prevention! Jinan belongs to a temperate monsoon climate, with rainy and humid summers and snowy and cold winters. Moisture and salt in the air can easily corrode light steel components. If anti-corrosion is not done well, they will rust and peel after three to five years of use, which not only affects the appearance of the house, but also weakens the structural strength, shortens the service life, and makes later maintenance expensive and laborious. Today, we will talk about the two core anti-corrosion technologies for light steel structures in Jinan. Using plain language and practical data, we will explain the construction details and differences in quality. Whether it is building construction or later maintenance, after reading it, you can avoid pitfalls. Follow me and do structural related things. I can explain everything to you clearly.

　　第一种，也是济南轻钢防腐最常用、最靠谱的——热镀锌防腐法，主打一个“耐用、省心、防护性强”，适合室外、潮湿等各种复杂场景。它的核心原理很简单，就是把加工好的轻钢构件，整体浸入高温金属锌液中，让钢材表面自然形成一层纯镀锌层，次表面形成致密的锌合金镀层，这两层镀层就像给轻钢构件穿了一件“防护铠甲”，能牢牢隔绝空气、水汽，从根源上阻止钢材腐蚀。

　　The first and most commonly used and reliable anti-corrosion method for light steel in Jinan is hot-dip galvanizing, which emphasizes durability, peace of mind, and strong protection, suitable for various complex scenarios such as outdoor and humid environments. Its core principle is very simple, which is to immerse the processed light steel components as a whole in high-temperature metal zinc solution, allowing a layer of pure zinc plating to naturally form on the surface of the steel, and a dense zinc alloy coating to form on the secondary surface. These two layers of coating are like putting a "protective armor" on the light steel components, which can firmly isolate air and water vapor, and prevent steel corrosion from the root.

　　给大家上一组实测数据，更直观感受它的实力：济南轻钢常用的热镀锌涂层，厚度控制在80-120μm，致密且均匀，比普通镀锌层防护性提升60%；在济南多雨潮湿环境下，正常使用无需额外维护，防护期可达15-20年，比普通防腐方法寿命长3倍以上。而且热镀锌涂层附着力极强，附着力等级达1级，不易剥落、不易开裂，哪怕轻微磕碰，也不会轻易露出钢材本体，抗腐蚀能力拉满。

　　Here is a set of measured data for a more intuitive experience of its strength: the hot-dip galvanized coating commonly used in Jinan light steel has a thickness controlled between 80-120 μ m, is dense and uniform, and has a 60% improvement in protection compared to ordinary galvanized layers; In the rainy and humid environment of Jinan, normal use does not require additional maintenance, and the protection period can reach 15-20 years, which is more than three times longer than the service life of ordinary anti-corrosion methods. Moreover, the hot-dip galvanized coating has extremely strong adhesion, with an adhesion level of 1. It is not easy to peel off or crack, and even slight bumps will not easily expose the steel body. Its corrosion resistance is fully developed.

　　不过热镀锌施工有严格要求，这几点一定要记牢，不然会影响防腐效果。施工时，必须保证所用的热镀锌构件外表光滑、无剥落、无漏镀、无滴瘤、无残留，每一根轻钢龙骨、每一个连接件，都要确保镀锌层全覆盖，无任何死角——实测显示，漏镀面积超过0.5%，就会让构件防腐寿命缩短50%以上。另外，热镀锌构件出炉后，要自然冷却至常温，不能用水直接冲洗，避免镀层开裂，这也是很多施工队容易忽略的细节。

　　However, hot-dip galvanizing construction has strict requirements, and these points must be kept in mind, otherwise it will affect the anti-corrosion effect. During construction, it is necessary to ensure that the hot-dip galvanized components used have a smooth surface, no peeling, no missing plating, no dripping, and no residue. Every light steel keel and every connecting piece must ensure that the galvanized layer is fully covered and there are no dead corners - actual measurements show that if the missing plating area exceeds 0.5%, the anti-corrosion life of the components will be shortened by more than 50%. In addition, after hot-dip galvanized components are taken out of the furnace, they should be naturally cooled to room temperature and should not be washed directly with water to avoid cracking of the coating, which is also a detail that many construction teams tend to overlook.

　　第二种，涂装防腐法，主打一个“低成本、施工便捷”，更适合室内轻钢构件，室外使用性价比不高。它的施工流程很简单，不用高温处理，先将纯锌粉溶解，调配成专用镀锌底漆，然后均匀涂刷在轻钢构件表面，通过底漆成膜固化，在构件表面形成一层防护膜，从而阻挡腐蚀介质侵蚀钢结构材料，原理和咱们给家具刷油漆防锈差不多。

　　The second method is anti-corrosion coating, which focuses on "low cost and convenient construction" and is more suitable for indoor light steel components. The cost-effectiveness for outdoor use is not high. Its construction process is very simple. It does not require high temperature treatment. First, pure zinc powder is dissolved and mixed into a special galvanized primer. Then, it is evenly coated on the surface of light steel components. Through the curing of the primer film, a protective film is formed on the surface of the components to prevent corrosive media from corroding the steel structural materials. The principle is similar to painting furniture for rust prevention.

　　这种方法的优势很明显，施工成本比重镀锌低40%左右，每平方米施工成本仅20-30元，而且施工灵活，不用大型设备，室内狭小空间也能轻松施工。但它的短板也很突出，防护性和耐久性远不如热镀锌，尤其是在济南室外环境中，风吹日晒、雨淋雪泡，涂装层容易老化、脱落，防护期仅3-5年，后期需要频繁补漆，反而增加维护成本。

　　The advantages of this method are obvious. The construction cost is about 40% lower than galvanizing, with a construction cost of only 20-30 yuan per square meter. Moreover, the construction is flexible, without the need for large equipment, and can be easily carried out in small indoor spaces. But its shortcomings are also prominent, its protection and durability are far inferior to hot-dip galvanizing, especially in outdoor environments in Jinan, where the coating layer is prone to aging and peeling due to wind, sun, rain, snow, and bubbles. The protection period is only 3-5 years, and frequent repainting is needed in the later stage, which actually increases maintenance costs.

　　涂装防腐的施工细节也不能马虎，不然等于白做。在实际工程中，底漆必须涂刷4-5遍，每一遍的厚度控制在15-20μm，总厚度不低于80μm，而且要等上一遍油漆干至80%以上，或者完全干透后，再涂刷下一遍，不能急于求成。如果涂刷间隔太短，油漆无法充分固化，会出现起皱、脱落的情况，实测显示，未干透就涂刷下一遍，会让防护效果降低70%，使用寿命缩短一半。

　　The construction details of anti-corrosion coating should not be careless, otherwise it is equivalent to doing nothing. In practical engineering, the primer must be applied 4-5 times, with a thickness of 15-20 μ m for each coat and a total thickness of not less than 80 μ m. The next coat should be applied after the previous coat of paint has dried to over 80% or completely dried, and should not be rushed. If the brushing interval is too short, the paint cannot fully cure and may wrinkle or peel off. Tests have shown that brushing the next coat before it dries completely can reduce the protective effect by 70% and shorten the service life by half.

　　结合济南轻型钢结构的实际应用场景，给大家一个实用建议：室外轻钢构件（比如屋顶龙骨、外墙框架、室外平台连接件），优先选热镀锌防腐，虽然初期施工成本稍高，但15年不用额外维护，长远来看更省钱、更省心；室内轻钢构件（比如室内隔墙龙骨、吊顶龙骨），可以选涂装防腐法，成本低、施工快，而且室内环境干燥，能延长防护寿命，性价比更高。

　　Based on the actual application scenarios of light steel structures in Jinan, a practical suggestion is given to everyone: for outdoor light steel components (such as roof keels, exterior wall frames, and outdoor platform connectors), hot-dip galvanizing anti-corrosion should be prioritized. Although the initial construction cost is slightly higher, there is no need for additional maintenance for 15 years, which is more cost-effective and worry free in the long run; Indoor light steel components (such as indoor partition wall keels and ceiling keels) can be coated with anti-corrosion methods, which have low cost, fast construction, and a dry indoor environment, which can extend the protection life and have a higher cost-effectiveness.

　　给大家看一个济南本地的真实案例：长清区某农户盖的200㎡轻钢住宅，室外构件采用热镀锌防腐（厚度100μm），室内构件采用涂装防腐（4遍底漆，总厚度80μm），投入使用5年来，室外构件无任何生锈、剥落现象，室内构件也仅局部出现轻微褪色，无腐蚀痕迹；而旁边另一户农户，为了节省成本，室外构件也用了涂装防腐，仅3年就出现大面积生锈、脱皮，不得不重新补漆，额外花费了1.2万元。

　　Let me show you a real case from a local area in Jinan: a 200 square meter light steel residential building built by a farmer in Changqing District. The outdoor components are hot-dip galvanized for corrosion protection (thickness of 100 μ m), and the indoor components are coated for corrosion protection (4 coats of primer, total thickness of 80 μ m). After 5 years of use, the outdoor components have not rusted or peeled off, and the indoor components have only slightly faded locally without any corrosion marks; And another farmer next to it, in order to save costs, also applied anti-corrosion coating to the outdoor components. In just 3 years, a large area of rust and peeling appeared, and had to repaint, spending an additional 12000 yuan.

　　总结来说，济南轻型钢结构的防腐，选对方法比什么都重要——热镀锌（80-120μm，15-20年防护期）适合室外，耐用省心；涂装防腐（4-5遍，3-5年防护期）适合室内，低成本便捷。不管选哪种方法，都要严格按照施工要求操作，才能确保防腐效果，延长轻钢房屋的使用寿命。盖济南轻钢房，别只盯强度和造价，做好防腐，才能让房子住得更久、更安心，关注我，干结构啥都能干，帮你避开所有施工坑。

　　In summary, the right method is more important than anything else for the anti-corrosion of lightweight steel structures in Jinan - hot-dip galvanizing (80-120 μ m, 15-20 years protection period) is suitable for outdoor use, durable and worry free; Coating anti-corrosion (4-5 times, 3-5 years protection period) is suitable for indoor use and is low-cost and convenient. No matter which method is chosen, it is necessary to strictly follow the construction requirements to ensure the anti-corrosion effect and extend the service life of light steel houses. When building a light steel house in Jinan, don't just focus on strength and cost. Do a good job of anti-corrosion to make the house live longer and more comfortably. Follow me, I can do anything with the structure and help you avoid all construction pits.