Want To Slow Down The Corrosion Rate Of The Sewage Pump? CNSME Slurry Pump Teaches You A Few

In industrial production, corrosion is a common and troublesome problem.Corrosion protection for sewage pumps is very important, so how to prevent corrosion?CNSME PUMP  slurry pump teaches you a few tricks.

　1. Lining

　 Lining is usually made of a single piece of material and is suitable for equipment in contact with highly corrosive media.For example, storage tanks for hydrochloric acid and dilute sulfuric acid will be lined with rubber or plastic, while steel tanks for storing nitric acid will be lined with stainless steel plates.Enamel is actually a glass lining, known in the industry as enameled glass.It has strong acid resistance and is widely used in food, pharmaceutical and other industries.

　2. Correct material selection and design

　Understanding the corrosion resistance of different materials and selecting corrosion-resistant materials correctly and reasonably is an effective method.*, there are many kinds of materials, and different materials have different corrosion rates in different environments.Material selectors should choose materials with low corrosion rates, low prices, and physical and mechanical properties that meet the design requirements of specific environments to obtain an economical and reasonable equipment service life.\u0026nbsp;

　3. Coating

　Organic coatings are widely used to protect metal structures in the atmosphere. The coating covers the metal surface of the sewage pump and forms a porous film after drying.Although it does not *isolate* the metal from the medium, it increases its value and reduces the corrosion current through the diffusion resistance and solution resistance of the micropores.In mild environments such as the atmosphere and seawater, the metal at the bottom of the micropores corrodes slowly.Corrosion products will clog micropores and have a long service life.However, it is not suitable for use in strongly corrosive solutions because metal corrodes quickly and the generation of hydrogen can cause the paint film to crack.

　4. Surface treatment

　 Before contacting the environment, the metal should be treated with a passivating agent or film-forming agent.A stable and dense passivation film is formed on the metal surface, and its corrosion resistance is greatly improved.It differs from the corrosion inhibitor method in that there is no need to add corrosion inhibitors in future use environments.After anodizing aluminum, the surface can form a denser film than would be produced in the atmosphere.This film has excellent corrosion resistance in mild corrosive environments, and is also the principle behind the blue surface of steel parts.

　5. Add corrosion inhibitors

　Usually, by adding a small amount of corrosion inhibitors to the corrosive environment, the corrosion of metals can be greatly reduced.We usually divide them into three types: inorganic inhibitors, organic inhibitors and gas phase inhibitors, and their corrosion inhibition mechanisms are also different.

　6. Adjust the environment

　If the various factors causing environmental corrosion are eliminated, the corrosion of the sewage pump will be terminated or slowed down.However, most environments cannot be controlled, such as moisture in the atmosphere and soil, oxygen in seawater, etc., and chemical production processes cannot be changed at will.However, some local environments can be adjusted.For example, boiler incoming water must first be deoxygenated to protect the boiler from corrosion.For example, water should be removed before air enters a closed warehouse, which can also prevent stored metal parts from rusting.In order to prevent cooling water from scaling and perforation on heat exchangers and other equipment, alkali or acid can be added to the water to adjust the pH value to a suitable range (close to neutral).) refining process to keep the production liquid neutral or alkaline.When the temperature is too high, the walls can be cooled or lined with refractory bricks to insulate the inner walls of the equipment.These are methods that change the environment without affecting the product and process.Subject to permission, it is recommended to choose mild media rather than highly corrosive media in this process.

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