Niyu Wei 1, Song Zhang 1, LI Yong 1, Jian-Yu Wang 2, Lin Maoguang 2
(1. Navy logistics technology and equipment, Beijing 100072; 2. Guangzhou Military Region Air Force Engineering Construction Bureau, Guangzhou 510010)
Abstract: This paper introduces the basic principles of design of tank coatings, metal tanks for the cave in different parts of the formulation of corrosion of the coating supporting table; by improving anti-corrosion construction technology, developed Painting Quality control procedures, improved the cave painting of metal oil tank system.
Keywords: cave; metal tanks; paint matching table; coating system
0 Introduction Cave metal tanks in order to ensure life cycle in the safe use of surface coating is widely used Corrosion Method, the principle of this method is to iron and steel materials and corrosive environment to isolate in order to achieve the purpose of corrosion. As the prices and construction technology and other reasons, zinc, aluminum anti-corrosion coating can not spread, the most used method of coating or surface coating. Therefore, to do anti-corrosion coating is the cave one of the key metal tank corrosion. However, in the cave of metal fabrication and installation of oil tank, there re-install the light corrosion ideas, first expressed in the paint choice, antistatic coating on the inner wall is still relatively ignored, and the tank bottom paint on the wall and the choice of certain randomness, relatively severe corrosion on some parts is not enough done to enhance corrosion. In the anti-corrosion construction, the substrate processing is not complete, paint does not according to design requirements, coating quality control in place, the design thickness of the coating reach the phenomena also occur. To this end, the design by identifying the basic principles of tank coatings; improved anti-corrosion construction technology; develop the cave supporting tables and metal tanks paint coating quality control procedures, etc.; proposed a more detailed caves metal tank coating system.
1 caves metal tanks the basic principles of coating design
(1) according to different parts of the different selection of corrosion coating;
(2) under the tank design life cycle and maintenance choice paint;
(3) on the bottom of the tank and weld parts to be used to enhance corrosion;
(4) wall storage site must be static conductive coating;
(5) cave paint required to have anti-fungal properties;
(6) with all parts of life design, easy maintenance appropriate to extend the design life of parts.
2 caves metal tank coating formulation auxiliary table
Metal tanks for the caves, as tank top, tank walls and bottom of the tank and the tank wall and corrosion of corrosion of different elements to be considered separately. This reference HG/T20679? 1990 " Chemical industry Equipment, piping design requirements of foreign anti-corrosion ", SY0007? 1999" steel pipe and tank corrosion control engineering design ", SH3022? 1999" petrochemical equipment and pipeline corrosion coating specification ", GB13348" classic safety regulations of liquid petroleum products " , SY/T0061? 2004 "Organic buried steel pipeline wall corrosion layer specification" and other standards, combined with the corrosion of metal tanks and metal tanks and anti-corrosion mechanism of construction experience made cave complete list of metal tank coating . Applicable to all kinds of cave wall painting inside and outside of metal tanks. Specific application, be taken into account tank design life of the tank using the environment, storage media and other factors, select the appropriate supporting systems.
2.1 tank wall
Caves metal tank wall as the hole database, regardless of UV resistant coating performance, but be sure to have excellent resistance to heat, salt spray and other properties, but also have good mechanical properties and workability. After 10 years of practice, two-component epoxy coatings can meet the needs of the specific coating systems in Table 1.
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