Corrosion Protection Coating for Oil Tanks
1. Critical Quality Control Measures in the Construction of Anticorrosive Coatings for Oil Tanks
Preparation Stage before Construction:
Before commencing the construction of anticorrosive coatings on oil storage tanks, thorough preparations are essential to enhance construction quality and mitigate potential issues. Initially, conduct a comprehensive observation of the tank's surface, focusing on areas exhibiting rust. Perform a detailed investigation and analysis to determine the degree of corrosion on the tank's surface. Scientifically evaluate the corrosion level to implement corresponding anti-corrosion construction measures. Subsequently, ensure a meticulous cleaning of both the exterior and interior of the oil storage tank, removing attachments to accurately assess surface corrosion. Treat unwelded weldments and connectors on the tank's surface in preparation for the anticorrosion construction.
2. Quality Control during the Construction Process of Oil Storage Tank Anticorrosive Coating:
(1) Compressed Air Treatment:
Compressed air is essential during the sandblasting process of the oil storage tank's anticorrosive coating. Ensure that compressed air remains dry by using cooling and oil-water separation devices to treat it in advance before initiating the anticorrosive construction.
(2) Construction Environment Survey:
During the sandblasting construction, adhere strictly to construction regulations and survey the construction environment in advance. Clean the construction site thoroughly before initiating the construction, and use compressed air to dry the water on the surface of the oil storage tank. If the initial sandblasting is unsatisfactory, improve the tank surface's smoothness through repeated sandblasting.
(3) Controlled Sandblasting Process:
In the sandblasting construction process, reasonably control the sandblasting time and area. Pay attention to avoiding excessively long or large time and area for a single sandblasting. Manual rust removal can be employed for positions where equipment spraying is challenging.
(4) Post-Sandblasting Inspection:
After completing the sandblasting construction, conduct rigorous quality inspections of the sandblasting effect. Evaluate the degree of rust removal on the oil storage tank surface during the inspection. Ensure proper site illumination during inspections, and avoid direct contact with the tank surface. Areas with incomplete sandblasting found during inspection should be promptly treated again.
3. Quality Control Approaches in the Construction of Anticorrosion Coatings for Oil Tanks
(1) Quality Control in Manual Painting Construction:
Manual brushing involves constructors applying paint to the oil storage tank surface using manual brushing tools. While this method is operationally simple, cost-effective, and flexible to various construction conditions, it comes with higher labor intensity and lower efficiency. Manual brushing is influenced by the skill levels of workers, leading to potential issues such as uneven application, poor aesthetics, and subpar results.
(2) Quality Control in Compressed Air Spraying:
Compressed air spraying is a prevalent method for oil storage tank anticorrosive coating construction. This technique utilizes compressed air to propel anticorrosive coating through a spray gun, which then sandblasts the tank's surface. The process ensures uniform coating, high aesthetics, and strong operability. Compressed air spraying surpasses manual painting in terms of efficiency and coverage area. However, consideration must be given to dust pollution, and the selection of high-quality, low-toxicity coatings is crucial to minimize environmental and personnel impact.
(3) Quality Control in Scraping Construction:
Scraping construction involves applying anticorrosive paint to oil storage tanks using metal or non-metal materials. This method is particularly useful for addressing pinholes, gaps, or thick coatings. While scraping construction can impact the aesthetics and smoothness of tank coatings, it tends to have lower construction efficiency. Selection of appropriate scraping tools and methods is necessary based on specific conditions during actual construction.
(4) Quality Control in High-Pressure Airless Spraying Construction:
High-pressure airless spraying directly pressurizes soil material using specialized equipment, creating a high-pressure paint mist for application on the tank surface. This method ensures dry and pure paint during spraying, with high efficiency, minimal environmental pollution, and low energy consumption. It proves to be an economical and practical technology for anticorrosion construction. However, its application requires a high technical proficiency level among construction personnel and suitable environmental conditions. It may not be suitable for narrow or enclosed spaces, necessitating a thorough survey and a well-formulated construction plan to ensure quality and safety.
The quality of the anticorrosive coating construction for oil storage tanks plays a pivotal role in the development and transportation of oil. Any issues in the construction of these coatings can lead to irreversible damage to the oil storage tank. If corrosion problems escalate, it may result in oil leakage, causing severe environmental pollution and elevating the risk of safety incidents. This poses a significant threat to the overall safety and sustainability of oil enterprises. Therefore, there is a critical need to enhance quality management and control, adopt suitable construction methods, develop comprehensive construction plans, and provide robust technical guidance for oil tank anticorrosive coating construction. This approach is essential to ensure the effective and secure development of oil tank anticorrosive coating construction.
