Explore chapters and articles related to this topic
Introduction to Corrosion
Published in S.K. Dhawan, Hema Bhandari, Gazala Ruhi, Brij Mohan Singh Bisht, Pradeep Sambyal, Corrosion Preventive Materials and Corrosion Testing, 2020
S.K. Dhawan, Hema Bhandari, Gazala Ruhi, Brij Mohan Singh Bisht, Pradeep Sambyal
Phosphate ions combine with zinc ions leading to the formation of zinc phosphate and its deposition on the substrate surface: ()3Zn2++2PO43−→Zn3(PO4)2
Flame Retardant and Smoke Suppressant Additives for Polypropylene: Vermiculite and Zinc Phosphate
Published in Ali Pourhashemi, Sankar Chandra Deka, A. K. Haghi, Research Methods and Applications in Chemical and Biological Engineering, 2019
Fatma Üstün, Hasan Demir, Devrim Balköse
The flame retardent zinc phosphate can be synthesized from different water-soluble compounds by precipitation reactions. It was synthesized from zinc nitrate, sodium hydroxide, and phosphoric acid or casein by Ramos et al.20 Macroporous particles were obtained after hydrothermal synthesis and thermal treatment. Nano zinc phosphate was precipitated by mixing zinc nitrate and sodium phosphate solutions having etoxylated surfactants by Navare et al.18 Various phosphate compounds such as phosphoric acid, sodium di-hydrogen phosphate, disodium hydrogen phosphate, sodium pyrophosphate, or sodium triphosphate were used in zinc phosphate synthesis.21,22
Insulation, Coatings, and Adhesives in Transmission and Distribution Electrical Equipment
Published in Bella H. Chudnovsky, Electrical Power Transmission and Distribution, 2017
To improve corrosion resistance of a powder coating, primer coating is usually used. For example, either zinc phosphate (for outdoor application) or iron phosphate (for indoor applications) is used as a primer under polyester power coating to improve the corrosion resistance of the paint.
Theoretical studies of the spin Hamiltonian parameters and local structures for WO3 doped Zn3(PO4)2ZnO nanopowders
Published in Molecular Physics, 2020
Yi-Ming Xu, Shao-Yi Wu, Han-Zhang Liu, Wen-Tao Ye, Bao-Hua Teng, Ming-He Wu
Studies of inorganic nanostructures are vital to reveal novel phenomena which are applicable in the new areas of technology. Zinc phosphate (Zn3(PO4)2) is an inorganic non-toxic compound and one of the most frequently used anti-corrosion pigments on metal [1]. Zinc phosphate dental cement has the longest track of record of use in dentistry as a base of dental restorations [2]. Zinc phosphate can also act as a catalyst for photodegradation of organic dyes with fairly good photostability. On the other hand, zinc oxide (ZnO) is a wide-bandgap semiconductor of the II-VI group and serves as a prospective substitute material for advanced functional devices. ZnO nanomaterials can be used in gas sensing, supercapacitors liquid crystal displays [3], antireflection coatings [4], photocatalysts, photodegradation of organic dyes [5], nano-fertilizers and active food packaging [6].
Corrosion behaviour of an industrial shot-peened and coated automotive spring steel AISI 9254
Published in Corrosion Engineering, Science and Technology, 2018
Mazher Ahmed Yar, Ying Wang, Xiaorong Zhou, Constantinos Soutis
A variety of coatings are in practice to achieve desired properties on components’ surfaces for protection against mechanical wear or corrosion for certain application. Phosphate treatments (zinc, manganese and iron) are commonly used in different industrial fields to fulfil various purposes, to provide corrosion/wear resistance, lubrication or electrical insulation [17,18]. Zinc phosphate (Zn.P) coatings are well known in the automotive industry as pre-treatment for painting. As an important surface treatment, they are used for corrosion protection on ferrous metals and can be applied by immersion or spraying, or a mixed spray-dip process [17]. Phosphate coatings are generally porous and are considered to favour/to improve paintability [19,20] offering better adhesion with the metal surface. The coating morphology, thickness (weight/area) and porosity depend on the applied process, conditions and additives [18,21,22]. The performance of the coating to resist corrosion is determined by the thickness and porosity [18-22].
Preparation of novel cosmetic white pigments by mechanochemical treatment of zinc oxide with phosphoric acid
Published in Journal of Asian Ceramic Societies, 2022
In a previous study, zinc oxide was shaken in phosphoric acid at various temperatures to obtain zinc phosphate-coated zinc oxide particles [13]. As a result, target particles with a core-shell structure, where the core is zinc oxide and the shell is zinc phosphate without photocatalytic activity, were obtained. However, the obtained zinc phosphate-coated zinc oxide contained particles larger than 10 µm. The purpose of this study was to obtain white pigments with sub-micrometer size without photocatalytic activity by controlling the reaction between zinc oxide and phosphoric acid. Therefore, we studied the mechanochemical reaction between zinc oxide and phosphoric acid. Mechanochemical treatment is known to reduce the size of particles in the reaction of powder materials.