Does the dry powder extinguisher have any corrosive effect on iron products? Why?
These substances are electrolytes that corrode when metal materials contact electrolyte solutions and react with electrodes. Electrochemical corrosion reaction is a redox reaction. In the reaction, the metal loses electrons caused by oxidation, the reaction process is called the anode reaction process, the reaction product is a metal oxide into metal ions in the medium or covering on the surface of metal (or metal insoluble salts); medium access to electronic material from the surface of the metal is reduced, the reaction process is called the cathode reaction process. In the cathode reaction, the material that gets electrons and is reduced is customarily called a depolarizing agent.
The fire is the core component of dry powder fire extinguishing agent, can play the role of the fire extinguishing material mainly includes: K2CO3, KHCO3, NaCl, KCl, 2S (NH 4) O 4, N H 4H 2S O N a H C 4, O 3, K4Fe (CN) 6 - 3H2O and Na2CO3, has been at home the production of products: ammonium phosphate, sodium bicarbonate, sodium chloride, potassium chloride powder extinguishing agent.
The additive is composed of fine solid powder which is dried, crushed and mixed. It is a fire extinguishing agent widely used in fire fighting, and is mainly used in fire extinguishers. In addition to fighting special fire extinguishing chemicals fire extinguishing chemicals, dry powder fire extinguishing agent is generally divided into two categories of BC dry powder extinguishing agent (sodium bicarbonate, etc.) and ABC dry powder (ammonium phosphate, etc.). One is to rely on the inorganic salt powder volatile decomposition products, chemical inhibition and negative catalysis and fuel combustion in the process of free radicals or reactive groups, the chain reaction to fire disrupted extinguishing; two is on the outer surface of combustible powder by powder, chemical reaction, and the formation at high temperature under a glass cover layer, thereby isolating oxygen, then smothering. There is also partial dilution of oxygen and cooling action.
