4TH INTERNATIONAL CONFERENCE ON ENGINEERING AND NATURAL SCIENCES (ICENS 2018), Kyyiv, Ukrayna, 2 - 06 Mayıs 2018, ss.192
Polyamide (PA) is a well-known engineering polymer. Having various types with different properties, PA exhibits superior physical and mechanical properties. Among them PA 12 has the lowest moisture absorption as well as higher abrasion resistance. These properties made them preferable coating material. PA 12 coating are widely used in wire products, automobile parts, medical supplies, pipelines and fittings and many industrial items. Improvement of these properties plays an important role on its application areas. To achieve this goal several types of fillers are used in plastics. In the present study, the influence of CaCO3 and TiO2 on the properties of PA 12 coating was investigated.
Low carbon steel plates were coated by tape casting method. PA12 powder with 26 µm and CaCO3
and TiO2 powder under 20 µm particle sizes were used. The Slurry prepared with ethanol and varying
filler amounts were applied on steel substrate with 1 mm thickness and molten at 180°C under
atmospheric conditions. The final thickness of the samples was measured by using profilometer
around 400 µm. Scanning electron microscopy (SEM) was used for morphological investigations.
Abrasion and surface roughness tests were also carried out on samples. Additionally mechanical tests
as hardness and tensile tests were made to characterize the coating properties. Achieved results
revealed that, different amounts of both CaCO3 and TiO2 additions as filler improved the properties.
Moreover compared to CaCO3, TiO2 addition in coatings, showed better results.