New type of anticorrosive pigment is introduced

New antirust pigment research has always been the hot spot of the corrosion protection industry,the current market products is uneven,the performance difference is larger.

Modified phosphate series of antirust paint

Traditional zinc phosphate is limited by a lot of in the practical application,its particle size is larger,dispersing performance is not ideal,easy to crystallization,is the most important of its early antirust performance is not ideal,used in waterborne coatings is difficult to avoid rust problem,and lead the antirust pigments containing chromium and antirust effect there is a big difference.But rust resistance and anticorrosive mechanism gives us great inspiration,so on the basis of the development of a lot of excellent antirust paint.

Abroad have found that the boron calcium silicate,phosphate calcium silicate strontium calcium,phosphorus,zinc silicate strontium, zinc phosphate,zinc,zinc oxide,nitrobenzene 2 formic acid zinc molybdate and benzoic acid zinc salt there is rust between enhanced role;The us navy has developed a new type of non-toxic,since the bottom,there is light is dedicated to the metal (DTM)) (aluminum and steel surface coating,used in the plane,the coating using zinc,zinc phosphate and small amounts of benzoic acid zinc molybdate salt mixing antirust pigments synergistic system,and replace the original use zinc chromate antirust paint,the effect is good,and in the waterborne epoxy primer,the antirust paint system consists of zinc phosphate and organic nitro compounds of zinc salt,aluminum zinc phosphate hydrate hybrid system.The organic nitro compounds of zinc salt than the water soluble zinc phosphate is strong,so overcome the zinc phosphate,such as anti-corrosion effect is not strong in the early years of the pigment ills,zinc and aluminum phosphate hydrate is also for the same reason as well as increase the content of zinc and phosphate ions anti-corrosion anti-corrosion system for extended time more.These examples show that as long as reasonable collocation,points out the performance of anti-rust paint can achieve lead series is completely antirust pigments containing chromium and antirust effect.

Type ion exchange antirust paint

With grace company developed SHIELDEX type does not contain heavy metals,mainly antirust pigment,calcium ion exchange silicone antirust paint.Use corrosive electrolyte into the coating,the contact with the antirust paint,paint will the corrosive ions obtained on the surface of silica,and release the corresponding calcium ion transfer to the metal substrate,when this process continues,the calcium accumulation in the metal and the coating layer of interface,thus plays a barrier and protection of the substrate,and to enhance the adhesion of coating,the coating of anticorrosion performance is greatly enhanced.But such antirust pigment prices generally higher,and big oil absorption.Secondly its due to alkaline,easy and adsorption of acidic catalyst activity,and affect the curing coatings.So significantly affects its use.

According to the characteristics of this kind of antirust pigments,in order to solve the defects in the use process,developed a kind of inorganic silicate antirust pigment ABR series titanium powder,its using silica as the main body,carries on the surface modification, make its have certain activity,the factors such as the chloride ion corrosion,erosion,such as water and oxygen to the steel surface,the Fe during oxidation corrosion,the critical level of the coating and the substrate to form the micro cell structure,the active ingredient of the silica will be activated,the silica partly dissolved into silicate ions,silicate ions in the reaction with iron ion,generate silicate iron,iron silicate deposition on the surface of the substrate and the gaps between the coating and the substrate for protection at the same time,also effectively enhance the density of the coating.

By Nicole