Factors influencing surface finish

The proper coordination and regulation of such factors as speed and pressure of the iajection plunger, temperatures of both the dies and the metal, and gating and venting influence the quaUty of die castings, especially with regard to soundness of stmcture and surface finish. 

Experimental methods exist to determine a critical value for any one of these factors when the others are held constant. However, parameters such as pH, concentration of inhibiting ions (e.g., SO4"), dissolved gas, test area, flow rate, and surface finish influence the resistance to pitting. ... 

The neutralization of concrete leads to reduction of the corrosion protective function of concrete against reinforcing steel, and has an important influence on the durability of reinforced concrete structures. The neutralization is influenced by various factors (concentration of CO2 gas, type of concrete, water-to-cement ratio(W/C), water content, type of finishes and their thickness and permeability, temperature and humidity conditions, etc.). From the physicochemical point of view, this process can be considered to be the diffusion of CO2 inwards into concrete from the surface, accompanied by the conversion of Ca(0H)2 into CaC03. In this context, -unsteady state dynamics has been done for the progress of neutralization of concrete in order to rationally understand the process and the influence of finishes on the process (, . ... 

Components may be formed by removing metal "chips" by mechanical deformation. This process is referred to as machining. Machinability describes how a metal reacts to mechanical deformation by removing chips, with respect to the amount of metal effectively removed and the surface finish attainable. The mechanical properties of the metal will be the factors that influence the machinability of a metal. 

Depending on the operating conditions and metal-electrolyte combinations, different anodic reactions take place when sufficient pulse power is applied. Rate of anodic reactions is influenced by the supply of fresh electrolyte, which enables the removal of reaction products as soon as they generates into the machining zone. The electrolyte flow velocity is negligible in case of EMM. So there is not sufficient transfer of mass from one electrode to the other. This gives rise to the formation of diffusion layer at the electrode-electrolyte interface at anode. Machining performance e.g. MRR, accuracy and surface finish of the workpiece is affected by the factors as discussed already. 

Several factors directly or indirectly influence the surface finish of machined parts, such as cutting conditions, tool geometry, work material, machine accuracy, chatter or vibration of the machine tool, cutting fluid, and chip formation. The objective of this research was to investigate the effects of major input parameters on the surface finish of parts produced by dry turning and to optimize the input parameters. From a user s point of view, cutting parameters—cutting speed, feed rate, and depth of cut—are the three major controllable variables as such they were selected as input parameters. 

FilanriGnt Winding. In filament winding, many factors influence the product, including mandrel stiffness and surface finish, winding speed, resin precin-e, filament alignment and tension, and temperature control. 

This type of coating is generally used for rubber or thermoplastic elastomers where the double bonds can be used to give coupling and reinforcement. In general, PCC is used where fine particle size is the key factor. This primarily influences mechanical properties and surface finish. Good colour and high purity are also beneficial properties in certain applications. 

These processes are covered in other chapters of this text and will not be described herein. Factors such as substrate size, size distribution, shape, porosity, friability, and solubility may influence the release properties of the coated dosage form. The goal in coating is to apply the film in such a way that its release is governed by the intrinsic properties of the film, and not imperfection (core penetration, surface pores and defects, fines imbedded in the film, non-uniformity of distribution, etc.). In addition to the properties of the substrate and the coating material, the type of process selected may have a significant impact on the behavior of the finished product. 

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