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... hard chromium plating process relies on four main stages: vapor degreasing, manual cleaning, electropolishing and the hard chrome process. Figure 1 shows a flowchart with the main...
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Hard chrome plating is a process in which a layer of chromium is applied to a surface to improve corrosion and abrasion resistance, reduce friction and extend the life of parts used in extreme wear conditions.
3.1 Hard Chrome Plating Hard chrome plating is used in applications where parts will be subjected to a very high degree of wear, requiring a thicker layer of chrome. The added thickness induces cracks and greater porosity on the chrome surface. The cracks increase as the chrome thickness increases. Further
Hard Chrome Plating. This type of chrome electroplating is not very popular. It is a chrome plating that is applied when there is a need for heavy coating. It is normally measured in 1000sandts, unlike decorative chrome plating that measures a millionth of an inch.
Hard chrome plating, also called engineering chrome, is an electrolytically applied metal coating. Hard chrome plating demonstrates excellent hardness and lubricity, minimizes wear, reduces friction and prevents galling. These characteristics are applicable for critical engineering applications.
Figure 12.20-1 presents a process flow diagram for hard chromium electroplating. The process consists of pretreatment, alkaline cleaning, acid dipping, chromic acid anodizing, and chromium electroplating. The pretreatment step may include polishing, grinding, and degreasing. Degreasing
This article presents the major uses of hard chromium plating, and focuses on the selection factors, plating solutions, solution and process control, equipment, surface preparation, and crack patterns and other characteristics of hard chromium plating.
