epoxy powder coatings containing zinc aluminum phosphate (zap) and zinc phosphate (zp), which are the 2nd and 1st generation of phosphate-based pigments respectively, were applied to the surface of mild steel sheets. the anticorrosive performances of the coated samples were studied using electrochemical impedance spectroscopy (eis). cathodic disbonding resistance and the adhesion performance of...

lectroless nickel plating is a relaE. hvely new technological process. The first laboratory experiments were done in 1944 by A. Brenner and G. Riddelll during World War 11. Public announcements were made a few years later. This work bad been done without knowledge of the earlier observations by Roux in 1916* and by Wurtz3 in 1845. The early work was not successful due to poor quality reagents a...

Abstract: Interface between matrix/coating or coating/coating in fact represents a very complicate 6 thin interfacial layer. So interface model is necessary to avoid the difficulty on considering such a 7 complicate thin layer in analysis. Classic interface model and cohesive model have been widely used 8 in stress analysis of coating materials, though they cannot represent the effect of very t...

The outermost nanometres of a poly(vinylidene difluoride) (PVdF) based coil coating have been investigated using X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS). A reference PVdF based coating formulation and three variations of this formulation were characterised by XPS. The addition of flow agent and/or acrylic co-polymers induced significa...

In some engineering fields, wear resistance and a low friction coefficient are required at the sametime. In this research, PTFE nanoparticles and carbon nanotubes were co-deposited within Ni-Pmatrix to obtain an Ni-P-PTFE-CNT hybrid coating for wear resistance and a low friction coefficient.The tribological properties of the deposits were evaluated by pin on disc tribometer. T...

The lifespan of low-carbon steel petroleum pipelines can often be shortened by the erosion–corrosion damage caused their service conditions. Applying electroless Ni-P coating is a promising option to protect from environment due its high hardness and corrosion resistance. However, has low toughness but increased addition NiTi ductile particles. This work produced Ni-P-NiTi coatings different th...

Coatings have historically been developed to provide protection against corrosion and erosion that is to protect the material from chemical and physical interaction with its environment. Corrosion and wear problems are still of great relevance in a wide range of industrial applications and products as they result in the degradation and eventual failure of components and systems both in the proc...