PTFE-Containing Coating Obtained on Ti by Spraying and PEO Pretreatment

Abstract

In case of using titanium alloys in equipment exposed to aggressive media (for example, sea water), it is necessary to take into account and, first of all, prevent the formation of a galvanic couple of titanium and another metal/alloy, which in most cases leads to the corrosion destruction of the latter. Another significant problem of using titanium is its low wear-resistance and poor tribological characteristics. To impart the necessary properties to titanium and its alloys, a composite coating was formed on the top of titanium. For the coating formation, a combination of the plasma electrolytic treatment and polymer spraying was used. The SEM, EDS and XRD analyses established morphological features, elemental and phase composition of the composite coatings. Contact angles and the wettability parameters of the composite coatings were investigated. An analysis of the data obtained showed that composite coatings have better protective properties than untreated material and base PEO coatings.

The Study Influence Analysis of the Mathematical Model Choice for Describing Polymer Behavior

“…Both pure PTFE and composites based on it are used in various industries, such as mechanical engineering, the oil and gas industry, electrical engineering, medicine, etc. PTFE and its modifications are widely used in the production of electronic components and equipment such as capacitors, resistors, switches, and other components since they have a high dielectric constant and high temperature resistance [11][12][13].…”

Crosslinked Polymer Coatings of Poly (Acrylic Acid-co-acrylamide)/Polyethyleneimine (P(AA-co-AAm)/PEI) on Titanium Alloy with Excellent Lubrication Performance for Artificial Joints

“…Surface functionalization is a feasible and promising strategy to overcome these issues to prevent joint loosening caused by abrasive debris. Surface coating improves the physicochemical properties and functions without altering the main properties of the substrate [13,14]. For example, the polyelectrolyte multilayers prepared with layer-by-layer technology endow the desired properties, such as corrosion resistance [15], antibacterial [16], hydrophilicity [17], and excellent tribological performance [18,19].…”