Of corrosion inhibitors for steel works: first is passivation treatment: reinforced concrete structure, due to the concrete itself shows strong alkaline (PH > 12), also should pass "passivation" reinforced the general processing, several hundred "nano" formed in the steel surface thickness of Fe2O3 protective film, become the passivation film. Reinforcing steel bar in concrete under tight package is not prone to corrosion. Second, if the chloride ions in concrete exceeds bid badly, as a result of the existence of CL - significantly improve the conductivity and the existence of some other ions, make steel passivation film is destroyed, in easy corrosion condition. In the presence of air, water, steel is easier to further corrosion, eventually causing irreversible damage to the concrete.

So, in general, reinforced concrete corrosion protection there are two basic approaches: the first is to try to stop erosion environment harmful ions into the concrete. Such as: protective resistance of the concrete, the surface coating method. The second method is in can't completely prevent harmful material immersed, from inside the concrete erosion resistance and to reduce the harmful substances. Such as: add rust and corrosion inhibitor. Depending on the mechanism of resistance to rust, currently on the market commonly used more rust and corrosion inhibitor for mixed type, which can be roughly divided into the anode, cathode and three types of compound, when used according to certain proportion adding to the concrete can be directly, such as K - 16 reinforcement rust and corrosion inhibitor.

Mixed type of reinforcement rust and corrosion inhibitor in concrete principle of work is not to stop in the environment of harmful ions into the concrete, but after inevitably harmful substances into the concrete, using its resistance to rust, reduce harmful ion loss or its corrosion ability, make the reinforcement corrosion electrochemical process is restrained, in order to delay the process of the corrosion, prolongs the service life of concrete, such as: China thousand K - 16 reinforcement rust and corrosion inhibitor. Of corrosion inhibitors for concrete surface besmear brushs type, on the other hand, works by preventing the environment in harmful ions into the concrete, which have the effect of protection and resistance to rust, such as: concrete base of solid 1 #.

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Of corrosion inhibitors for steel application range is very wide, and is more and more attention in recent years. The main applications include:

(1) is given priority to with chlorine salt corrosion environment conditions, such as the Marine environment, water erosion area, the coastal tidal range zone and splash zone.

(2) the use of sea sand region for construction of concrete containing salt water.

(3) inland saline areas, salt lake region.

(4) the deicing salt injury of road and bridge.

(5) under the chlorine salt corrosive gas environment of reinforced concrete structures.

(6) has been corrosion repair of buildings.

(7) using low alkali cement or low alkali admixture of concrete.

When choosing and using reinforcement rust and corrosion inhibitor products, need to choose according to actual situation to determine mixed type, or besmear brushs type; Is to choose the type of solid or liquid form. Commonly used on the market of China thousand K - 16 steel rust inhibitor and dispersant belongs to mixed type of rust and corrosion inhibitor, products divided into insoluble in water mixed with the powder directly rust and corrosion inhibitor, the resistance to aqueous rust agent and water soluble crystalline powder rust resistance of three to choose from. Concrete base of solid 1 # material is commonly used coating class rust inhibitor and dispersant on the market.

Directly mixed with rust and corrosion inhibitor with one-time incorporation, the effect can keep 50 years or so. And the construction is simple, convenient, save time and cost is low. Its use effect is related to the quality of concrete itself, the high quality concrete can play a better rust resistance function, on the contrary, the poor quality of concrete even adding rust inhibitor and dispersant was hard to wear. Compared with the reinforced protection of epoxy coating and cathodic protection, rust resistance effect is obvious. But should not be used in the acid environment and not suitable for drinking water in the system should have, in order to avoid poisoning incidents.