INSTITUTE OF TECHNOLOGY OF METALS

DEVELOPMENTS OF THE INSTITUTE :: Development of anti-corrosive active polymer film for steel packing

 Active polymer film (APF) incorporates special compositions able to emanate from the polymer matrix and to physically, chemically and bio-chemically effects the adjacent objects. The corrosion-proof APF contains corrosion inhibitors as a functional additive that liberates from the polymer matrix following the mechanism of evaporation and syneresis.

There is lot of technical demand that should be control for production of anti-corrosive APF. Heat seal property of polymer film, vaporizing activity of inhibitor, waterproof and permeability ability of film

The basis of our technique for anti-corrosive active polymer films production is extrusion with polymer hose blowing or coating the gel type of inhibitor components on the film with special mixed adhesion. The methods of production differ by the type of active components introduction into the film or the economic decision making as following:

• Extrusion of polymer blends type
• Diffusive saturation type from the gaseous phase
• Solution of active liquid type.
• Solution of active component vapors type
• Modification of the nonplasticized hose type.
• Coating on the surface film with mixed inhibitor components.

It depends on customer’s economic decision that which type is more desirable for applying.

THE TECHNOLOGICAL BASIS

The technological basis of the studied group of APF is the polymer-solvent system. It helps to meet the requirements imposed on the film, i.e., it should be adequately strong, non-permeable, contain a certain amount of active components with a high diffusive mobility and able to liberate from the film.

When a polyethylene (PE) and vacuum oil (VO) mixture is heated to a temperature above the PE melting one, a colloidal solution is formed. At it’s cooling a concentration of phase with a high VO content is observed on the PE spheroid boundaries. This is followed by formation of the filled with VO communicating pores in PE matrix. Dissolved in VO active components move along these original channels. Stress in the matrix caused by disturbance of PE crystal lattice force the liquid phase to squeeze through the film (syneresis)

SCOPE OF PROJECT

1. Development of physic-mechanical property of anti-corrosive film and technology of their processing in products.
2. Establishment of corrosion test methods and performance of packing for anti-corrosive APF.
3. Development of technological equipment for manufacture of anti-corrosive APF
4. Optimization of inhibitor composition with chemical reaction.
5. Manufacture of experimental party of products and realization of their field tests.
6. Transmission of technology to the customer (include supervise on the condition of demand and pay for preparation from customer)