Zinc-rich paints are one of the most widely used coatings in various industries. In these coatings, high percentages of zinc powder (over 90% by weight in dry film) uses to provide effective cathodic protection, which can lead to many problems in these coatings: reducing the adhesion of the coating to the metal substrate, reducing the physical and mechanical properties and increasing the viscosity of the paint. In order to reduce the above problems, researchers have tried to replace small amounts of zinc powder with nanomaterials, simultaneously with the reduction of the percentage of zinc powder in these coatings, increase the cathodic protection period as well as the physical- barrier protection properties in these coatings. In this paper, the used nanomaterials in zinc-rich coatings were classified into five general categories and the role and mechanism of performance in each category were investigated. Metallic conductive nanomaterials (including aluminum, magnesium and zinc nanoparticles) with increasing electrical connections and improving corrosion products. Carbon-based conductive nanomaterials (including carbon black nanoparticles and carbon nanotubes) that enhance both cathodic protection and physical-barrier protection properties. Conductive polymers, including polyaniline, are often combined with other nanomaterials, reducing porosity and increasing the conductivity of the coating. Nonconductive nano materials (including nano-clay and layered double hydroxide) that their effect is due to the increased barrier properties of the coating and finally, graphene and its derivatives, due to their unique properties in addition to increasing the conductivity and the barrier properties, significantly increase the adhesion and cathodic delamination resistance.
پرداخت با کارتهای اعتباری بین المللی از طریق PayPal امکانپذیر است.
- دسترسی به متن مقالات این پایگاه در قالب ارایه خدمات کتابخانه دیجیتال و با دریافت حق عضویت صورت میگیرد و مگیران بهایی برای هر مقاله تعیین نکرده و وجهی بابت آن دریافت نمیکند.
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.