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Chinese Name: corrosion inhibitor
English Name: inhibitor; corrosion inhibitor
Other names: antirust agent
Definition 1: in corrosion system by adding a small amount of can make metal corrosion rate reducing material.
Subject: Marine Engineering ( a subject ); marine corrosion and protection ( two subjects )
Definition 2: a when it at the appropriate concentration and forms present in the environment ( medium ) when, can prevent or slow down the corrosion of chemical engineering material or composite material.
Subject: Marine Science and Technology ( a subject ); marine technology ( two subjects ); water resources development technology ( three subjects )
Definition 3: in a matrix material to add a small amount that could slow or to inhibit corrosion of metal additives.
Subject: Mechanical Engineering ( a subject ); Surface Engineering ( two subjects ); rust ( three subjects )
Performance
With the appropriate concentration and forms present in the environment ( medium ) when, can prevent or slow down the corrosion by chemicals or complex, so the corrosion inhibitor can also be referred to as a corrosion inhibitor. Its content is very small ( 0.1% to 1% ), but the effect is distinct. This protective method for metal known inhibitor protection. Corrosion inhibitor in neutral medium ( boiler water, cooling water ), acidic medium ( descale hydrochloric acid, before plating plating derusting pickling solution ) and gas ( vapor phase corrosion inhibitor ).
The medicament is efficient inhibitor and dispersant agent. Applicable to soft water closed water system, mainly for high corrosive water softening system, has a good corrosion inhibition. The iron and steel enterprises in the fume hood of the converter, blast furnace and other soft water closed type cooling water system has a good corrosion inhibition. Dosage in 1000-1500ppm. Phosphorus control in 10ppm.
Technical index
Index name
Index of appearance
A white liquid
Solid content > 50%
TP = 1%
Free monomer ( % ) less than or equal to 0.5%
Density (20 degrees C ) g / cm3 > 1.25
PH (1% solution ) 5.0-8.0
The effects and applications of corrosion inhibitors
In 1, BTA
Silver copper corrosion inhibitor BTA can be adsorbed on the metal surface to form a layer of thin film, copper and other metal protection from atmospheric and harmful medium corrosion; corrosion inhibitor BTA in the circulating cooling water system with a variety of scale inhibitors, bactericidal Algicide fit to use, to the circulating cooling water system corrosion effect is good, in circulating water dosage is 2-4mg / L. BTA can also be used as a copper silver discolor inhibitor, automobile cooling liquid, lubricating oil additives.
In 2, MBT
Copper corrosion inhibitor MBT can be used as the circulating cooling water system in copper corrosion inhibitor. Copper corrosion inhibitor MBT inhibition relies mainly on and metallic copper surface active atoms of copper or copper ions produce a chemical adsorption; or to a chelating effect so as to form a layer of compact and protective film, so that the copper equipment get good protection, the use of content for 4mg / L, MBT can also be used as plasticizer, acidic copper plating using spectrophotometric agent.
In 3, TTA
Copper corrosion inhibitor TTA with alcohol or alkali dissolved into water circulating water, the concentration of 2 10mg / L, if the water system in the nonferrous metal is corroded badly already, can according to the normal concentration is 5 - 10 times the product is added in order to make the system rapid passivation.
4, hydrochloric acid pickling inhibitor
Corrosion inhibitor for hydrochloric acid cleaning medium application premise for hydrochloric acid, sulfuric acid, amino acid, the substrate cleaning object is black metal. Hydrochloric acid pickling inhibitor for various types of high low pressure boiler pickling, and large equipment, pipe pickling. Acid corrosion ( dosage is 1-3 % ) corrosion speed is less than or equal to 1g / m2? H
When in use, acid pickling inhibitor is added in proportion to the diluted acid solution, open the circulating pump circulating cleaning, the cleaning process of adding acid liquid according to the proportion of adding corrosion inhibitors in acid pickling.