Issues to note for low surface treatment

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Low surface treatment refers to a surface treatment process that meets lower requirements, achieved through manual rust removal or the use of power tools for rust removal. In China, the concept of low surface treatment as understood by professionals does not match that used by workers in actual work, which often leads to serious surface treatment problems during construction. At present, the main problems associated with surface treatment in practical applications include the following: ① Rust removal. For the repair of some old projects, surface treatment becomes a rather difficult issue to resolve. Issues of this kind arise in areas such as the maintenance of old oil tanks and pipelines in petrochemical systems, as well as the maintenance of naval ships; the reason is that after a period of use, the surface of the steel plates becomes severely corroded. Moreover, maintenance work is often carried out on-site, and factors such as the skill level of the workers and other various considerations result in rust removal that does not meet technical requirements, thereby failing to ensure adequate corrosion protection. This is why low surface treatment requirements are specified—the issue with rusty coatings ； ②Oil removal issue. In the maintenance of ship fuel tanks, oil storage tanks, and oil pipelines, the surface is not only covered in rust but also contains oil; oil molecules penetrate deep into the steel plates, and conventional oil removal methods find it difficult to eliminate them completely. This has given rise to the issue of painting over oily surfaces ； ③Moisture problem. Different types of coatings have varying sensitivities to moisture; some require moisture in order to cure and form a film, while others cannot tolerate any presence of moisture. In the field of corrosion prevention, moisture is one of the main causes of steel rusting; therefore, to achieve good corrosion resistance, dehumidification is also a very important task, which leads to the issue of wet coating.