PDC Glass/Ceramic Coatings Applied to Differently Pretreated AISI441 Stainless Steel Substrates

Abstract

In this work, the influence of different cleaning procedures on adhesion of composite coatings containing passive ceramic and commercial glasses was investigated. Two compositions (C2c, D2-PP) of double-layer polymer-derived ceramic (PDC) coating systems, composed from bond coat and a top coat, were developed. In order to obtain adherent coatings, stainless steel substrates were cleaned by four different cleaning procedures. The coatings were then deposited onto the steel substrate via spray coating. Pretreatment by subsequent ultrasonic cleaning in acetone, ethanol and deionised water (procedure U) was found to be the most effective, and the resultant C2c and D2-PP coatings, pyrolysed at 850 °C, indicated strong adhesion without delamination or cracks, propagating at the interface steel/bond coat. In the substrate treated by sandblasting and chemical etching, small cracks in the bond coat were observed under the same pyrolysis conditions. After oxidation tests, all coatings, except for those subjected to the U-treated substrates, showed significant cracking in the bond coat. The D2-PP coatings were denser than C2c, indicating better protection of the substrate.

A Simple Method for a Protective Coating on Stainless Steel against Molten Aluminum Alloy Comprising Polymer-Derived Ceramics, Oxides and Refractory Ceramics

“…Active or passive fillers are, therefore, added to limit shrinkage. In the literature based on oxygen corrosion, the addition of glass in the PDC slurry can be noticed [ 17 , 18 , 19 ]. This glass improves the adhesion of the PDC-containing layer to the substrate and thus improves the corrosion protection of the metal.…”

“…This glass improves the adhesion of the PDC-containing layer to the substrate and thus improves the corrosion protection of the metal. Al 2 O 3 [ 17 ] or Al 2 O 3 -Y 2 O 3 -ZrO 2 [ 18 , 19 ] passive fillers are also blended to minimize the shrinkage and for its good antioxidation properties at high temperature. These, although interesting, composite PDCs have not been evaluated in the presence of molten aluminum.…”

Crosslinking Behavior of UV-Cured Polyorganosilazane as Polymer-Derived Ceramic Precursor in Ambient and Nitrogen Atmosphere

“…In recent years, polymer-derived ceramics (PDCs) based on silicon precursor such as polyorganosilazane have been used as precursors for ceramics [ 1 ], as they offer many advantageous properties, in particular excellent adhesion on numerous surfaces [ 2 , 3 ] as well as high thermal and chemical stability [ 4 ]. In addition, polysilazane serves as a component for the preparation of ceramic matrix composites produced by means of additive manufacturing [ 5 , 6 ].…”

“…The material presented here is a low-viscous and colorless polyorganosilazane, which has excellent adhesion properties to most surfaces. Therefore, it is used as coating material processed by spin- or dip-coating [ 3 , 27 ]. The solubility in most organic solvents and the resulting tailoring in viscosity make the material attractive for usage as binding material for filler-loaded preceramic polymer [ 28 , 29 ].…”

Special Issue: Recent Advances in Corrosion Science

“…et al [11] and Ryl et al [12] reveal various aspects concerning the search for efficient organic corrosion inhibitors and the tools used to evaluate protection mechanisms. The studies of Parchoviansky et al [13] and Winiarski et al [14] provide an insight on the development of anti-corrosion composite coatings, while an interesting report from Kania and Sipa [15] shows the improved corrosion resistance of anodic zinc coatings, obtained using a new thermal diffusion process.…”