How to prevent the corrosion of tinplate wall hydrogen sulfide blackening, expansion
Cathodic protectionProtective screen corrosion protection. The principle of protecting the screen is to make the metal of the anode corrode and protect the cathode metal material from corrosion. A metal or alloy (shielding material) connected to the surface of a metal tank and pipeline to be protected shall be protected from corrosion due to the low potential in the primary cell and corrosion of the screen material used as an anode. This method is applicable to the preservation of oil storage tanks, oil tankers and underground oil pipelines. Screen materials are commonly used, including series, aluminum, town and alloy.Cathodic protection of impressed current. Impressed current cathodic protection method is to protect the metal pipelines and oil storage tanks and electrical excavation of the negative link, as a cathode and protected; the power supply of the positive steel scrap corrosion. The method is applicable to underground oil storage tanks, underground pipelines and terminals, pipelines and tankers directly connected with the sea. Generally used anode materials are scrap iron and steel, graphite, high silicon iron, magnetic iron oxide, etc., these materials are consumed, can be replaced at any time.
Oil pipelines and oil storage containers buried in the ground are exposed to the water, salt, alkali and acid substances directly in the soil, and they should be coated with antirust paint on the outside surface, and then sprayed with asphalt protection layer.
Coating anticorrosionThe regular in metal storage tank inner wall spraying anti-corrosion coating, such as epoxy resin or lacquer layers.Spraying antirust paint on the pipeline and oil pump which are exposed to the atmosphere in a certain period.Setting up oil pipelines on the surface of the ground, to remove stagnant water and prevent soaking, so as not to peel off the coating.The movable metal parts in the oil tank equipment, such as the valves of the pipeline, should be coated with antirust grease or grease to prevent moisture from entering through the valve screw and causing corrosion. Outdoor doors should be equipped with protective covers to prevent rainwater from washing off the rust proof layer.The terminal is often set in the pipeline and equipment should be sprayed on the wet, corrosion or rust proof grease grease for protection of good standing.
