Plastic applications in the chemical industry

Environment and resources is the world's most compelling topics, scientific and rational use of limited resources is a fundamental protection.

Worldwide due to corrosion of materials, consume a lot of resources, resulting in huge losses to humans, hindering the development of productivity and leads to further deterioration of the global environment. According to some industrial countries, statistics, due to corrosion caused direct losses of GNP (GNP) of 2% to 4%, the most developed of the U.S. up to 4% or more. China every year due to corrosion caused direct economic losses of at least 200 billion yuan.

As an emerging class of plastic material, a relatively excellent chemical inertness and other good overall performance, has been in the field of anti-corrosion has been widely used. Plastic is an interdisciplinary corrosion, corrosion study and master the theory and application of plastic for further promote and expand the field of application of anti-corrosion plastic, save social wealth and resources have a very positive meaning.

1 Definition of plastic corrosion

Corrosion is a substance called environmental effects due to damage and deterioration caused by the phenomenon, the plastic sprayer in the chemical environment, the role of the media, its appearance, and mechanical damage caused performance degradation phenomenon, known as etching or chemical aging of plastic. Chemical aging is a form of plastic aging.

2 types of corrosion plastic

With the kind of plastic, chemical media, and environmental conditions, there may be different forms, varying degrees of chemical aging and erosion. Such as: Appearance (extinction, discoloration, wrinkling) changes, and mechanical properties (optical properties, electrical properties, weight) changes and chemical changes in structure and properties, study and master the plastics chemical aging of the law, can be more scientific and more reasonable used plastic, better use of plastics to solve corrosion problem.

Plastic corrosion basic reason for this is due to the chemical medium to penetrate inside the knapsack sprayer, diffusion to swelling, dissolution medium and the plastic cracking or chemical reaction, leading to a variety of corrosion phenomenon.

Plastic corrosion in general can be divided into: the primary valence bond within the polymer macromolecules damage secondary bonds between macromolecules damage. But usually these two types of composite damage and secondary bonds between macromolecules damage as much.