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In this book, the history of the concepts critical to the discovery and development of aluminum, its alloys and the anodizing process are reviewed to provide a foundation for the challenges, achievements, and understanding of the complex relationship between the aluminum alloy and the reactions that occur during anodic oxidation. Empirical knowledge that has long sustained industrial anodizing is clarified by viewing the process as corrosion science, addressing each element of the anodizing circuit in terms of the Tafel Equation. This innovative approach enables a new level of understanding and engineering control for the mechanisms that occur as the oxide nucleates and grows, developing its characteristic highly ordered structure, which impact the practical function of the anodic aluminum oxide.
This program demonstrates the step-by-step process of anodizing aluminum.
Anodic Oxidation of Aluminium and Its Alloys focuses on the basic principles of anodic oxidation, choice of materials, pretreatment, design, properties of the anodic film, testing, and maintenance. Organized into 16 chapters, this book begins with the principles of anodizing; applications of anodized aluminum; factors influencing the choice of grade of aluminum for anodizing; and factors influencing the choice of anodizing process. Subsequent chapters explain designing for anodizing; anodizing equipment; jigging (racking) methods for anodizing; chemical treatment processes before anodizing; and the anodizing process. The coloring, sealing, and stripping of the anodic coating; testing anodized aluminum; properties of anodized aluminum; maintenance of anodized aluminum; and effluent treatment for anodizing plants are also described. This text will be useful to students, technicians, product designers, architects, and engineers in the aluminum industry.
Surface finishing is a broad range of industrial processes that alter the surface of a manufactured item to achieve a certain property. Currently, the trend is towards surface treatments. Surface engineering techniques are generally used to develop a wide range of functional properties, including physical, chemical, electrical, electronic, magnetic, mechanical, wear-resistant and corrosion-resistant properties at the required substrate surfaces. In general, coatings are desirable, or even necessary, for a variety of reasons including economics, material conservation, unique properties, or the engineering and design flexibility which can be obtained by separating the surface properties from the bulk properties. Surface engineered products thus increase performance, reduce costs, control surface properties independently of the substrate and medium, thus offering an enormous potential in the finishing Industry. Electrodepositing of metals is a very significant industrial process. Electroplating is both an art and science .It entailed adhering a thin metal coating to an object by immersing it into an electrically charged solvent containing the dissolved plating metal. Electroplating served a number of functions, such as protecting from corrosion and wear, decoration, and electrical shielding. Anodizing most closely resembles standard electroplating. Anodizing or anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts. Anodizing increases corrosion resistance and wears resistance, and provides better adhesion for paint primers and glues than bare metal. Anodic films are most commonly applied to protect aluminium alloys.The aim of this handbook is to give the reader a perspective on several metal surface treatment techniques which are generally followed in the finishing Industry. This is a unique compilation and it draws together in a single source technical principles of surface science and surface treatments technologies of plastics, elastomers, and metals along with various formulae of bath solutions, current density, deposit thickness, manufacturing processes, various ingredients used in these processes. It is a very useful guide for the readers, engineers, scientists, practitioners of surface treatment, researchers, students, entrepreneurs and others involved in materials adhesion and processing.
Aluminium is a versatile and easily obtainable material which can be decorated using a variety of techniques. This book explains the anodising process, colouring media and methods of colouring including immersion dyes, painting and drawing, low-tech printmaking, digital print, and the clever use of resists.