From Design for Manufacturability Handbook, Second Edition
Chapter 8.1: Desiging for Cleaning
Chapter 8.2: Polished and Plated Surfaces
Chapter 8.3: Other Metallic Coatings
Chapter 8.4: Designing for Heat Treating
Chapter 8.5: Organic Finishes
Chapter 8.6: Desiging for Marking
Chapter 8.7: Shot-Peened Surfaces


Cleaning consists of the removal of contaminating or otherwise unwanted liquid, solid, or semisolid matter from the surfaces of a component. Though too often not considered a part of the manufacturing process, cleaning operations are very important in industrial production. They are also very common, perhaps the most frequently occurring of all manufacturing operations.

Cleaning operations are specified to put a component into proper condition for subsequent events. Most cleaning is for in-process use: to prepare the part for the next manufacturing operation, e.g., further machining, painting, plating, or assembly. Some cleaning is performed prior to storage to remove corrosives. Some is performed as a final operation to put the product in proper condition for sale and for use.

The choice of cleaning process to be used depends on three major factors: (1) the soil to be removed, (2) the degree of cleanliness required, and (3) the cost of cleaning. Part design is another factor, although a lesser one. It may influence the method of application of the cleaning agent.

Specifying the degree of cleanliness required is not easy. Normally, painting, plating, and other finishing operations require the highest degree of cleanliness. However, the degree of cleanliness required for a finishing operation is seldom specified on a parts drawing. Instead, it is left to...

Products & Services
Electrolytic Cleaning Equipment
Electrolytic cleaning equipment uses electrolytes and applied current to electrochemically clean welds and other metal surfaces. Electrolytic cleaners are also known as electrocleaners, weld cleaners and electrochemical cleaning systems.
Resurfacing, Recoating, and Refinishing Services
Resurfacing, recoating and refinishing services alter or restore damaged coatings and surfaces to a usable condition.
Plating and Coating Fixture Services
Plating and coating fixture service providers create durable finishes on racks, bins, trays, and other holding devices for use in painting and coating operations.
Parts Washing Services
Parts washing services remove grease, oil, dirt, soot and other contaminants from surfaces. They perform processes such as blasting, thermal cleaning, degreasing, oxygen cleaning, pickling, spray washing, immersion washing, mass finishing, stripping, and ultrasonic cleaning.
Filter Cleaners and Cleaning Equipment
Filter cleaners and filter cleaning equipment is used to clean or deblind filtration media in air and fluid filter units.

Topics of Interest

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A. Cleaning Processes Most industrial cleaning processes use a combination of the operations listed below. The particular cleaning process chosen depends on the nature of the soil to be removed, how...

Testing Techniques for Verifying Medical Part Cleanliness Traditionally, three techniques have been available for testing irregularly shaped devices to ensure that they have been cleaned adequately.