Hainan nodular cast iron manhole cover has good anti-corrosion effect in practical application, but if we don't use it well, the anti-corrosion products will also become non anti-corrosion, which is the most basic reason. So how do we carry out some anti-corrosion treatment on it in use? Let's have a look.
(1) Epoxy coal tar coating: epoxy coal tar coating is applicable to both gas pipeline and sewage pipeline. It is a two-component coating with high adhesion and very smooth surface.
(2) Epoxy ceramic lining: it is suitable for sewage pipeline and gas pipeline, but due to the difficulty of manufacturing process and high cost, it has certain limitations in the use of ductile iron manhole cover. Epoxy ceramic lining is an excellent anti-corrosion coating with high adhesion and smoothness
(3) Polyurethane coating: it is a new green special coating developed to meet the needs of environmental protection, with good wear resistance and corrosion resistance.
(4) Aluminate cement coating or sulfate cement coating: these two special cement coatings are applicable to the corrosion prevention of nodular cast iron manhole covers used for sewage pipes, improving the corrosion resistance of acid and alkali components in sewage.
(5) Cement mortar lining: the asphalt paint coating is applicable to the pipes conveying sewage, which can improve the corrosion resistance of the lining.
(6) Asphalt paint coating: it is applicable to the pipeline conveying gas. Preheating it before painting can improve the adhesion of asphalt paint and accelerate drying.
Although the anti-corrosion effect of nodular cast iron manhole covers has always been very good, corrosion will inevitably occur if they are used for a long time. How to deal with the corrosion phenomenon after it is officially put into use? This is a problem that has to be considered. I hope that the above introduction is enough to answer your doubts. For more information on plastic inspection wells, please pay attention to the official website of Hainan Plastic Industry Co., Ltd.
