# Electrical Property Measurement on Antistatic Coating During Aging Process
## 1 Introduction
Conventional conductive composites consist of a non-conductive polymer matrix in which a conductive component--carbon black, graphite, or carbon fibers--is dispersed. This also includes the use of anti-corrosion coatings [8; 20]. CPs, in which electrical conductivity is considered as the main property, are used to produce, e.g., electrostatic and conductive materials [21; 22; 23; 24; 25; 26] and a wide variety of other applications [27; 28; 29; 30; 31; 32]. The salts of polyaniline (PAN) and polypyrrole (PPY) have found their important application in anticorrosive paints [33; 34; 35; 36; 37; 38; 39; 40; 41; 42]. The application of paints containing corrosion-inhibiting pigments, which fundamentally and directly affect the properties of protective coatings, is one of the ways to protect these metallic materials [43]. Powdered CP salts, when applied to paints, cause problems with the stability of the paint in the liquid state. It is necessary to ensure the efficient dispersion and stabilization of the CP powders in the binder and the coating film. The coating then has a lower resistance to osmotic blisters or lower adhesion in high humidity environments, high cost, etc. [44]. For applications in paints and organic coatings, whether electrically conductive, anticorrosive, antistatic, or antimicrobial, among others, it is, therefore, more advantageous to apply CPs as a layer deposited on a suitable inorganic pigment particle. The pigment particles, in this case,serve as a CP carrier, ensuring its even distribution in the coating film. Thus, the pigment coating--CP [45]--is particularly active. Chemically inert materials such as TiO\({}_{2}\), various silicates, pigments of mineral origin (kaolin), or particles based on conductive C-graphite, C nanotubes, etc., are most used as pigments, which are treated with different types of CPs [46]. Coating the particles of chemically and/or anticorrosive active pigments (AP) of a semiconducting nature with CPs, for example, with polyaniline phosphate, allows us to obtain a pigment with synergistic properties of the two materials used (AP/PANI salt). The particles of the resulting CP-coated pigments should exhibit conductive polymer properties, higher electrical conductivity due to active protection of the metal substrate in electrochemical corrosion of metals, and, at the same time, anticorrosive activity in organic coatings when exposed to acidic corrosive substances and passivating the metal surface [47]. The main objective of this research was to investigate how the electrical properties of coatings with different admixtures change during the aging process. We assumed that the electrical properties would deteriorate after the aging process. The main role of coatings is to protect metallic materials against corrosion. Conventional coatings have low conductivity, and this causes a problem for devices where surface charge collects, as this charge is not reliably conducted to ground. For such cases, special coatings are used that have a higher conductivity. The electrical properties of such materials change during aging, and various parameters affect them. In normal practice, coatings are exposed to different weather conditions. Dry and warm weather prevails in summer, and cold and wet weather prevails in winter. Our measurements were carried out in the winter period, so the samples were placed outdoors under realistic conditions. The summer period was simulated in a dryer where we had a constant temperature and low humidity. We assumed that the conductivity of the coatings would decrease in both cases and our goal was to find out how. Another assumption was that dry and warm weather would significantly degrade conductivity compared to wet and cold weather. We proved this assumption.