Production Machining

SEP 2018

Production Machining - Your access to the precision machining industrial buyer.

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Page 48 of 75

?????? Cleaning Slowing Corrosion :: 47 :: Avoiding corrosion begins with parts that are clean, dry, contamination-free and fingerprint-free. Fingerprints, in particular, can be highly corrosive. That's why it is critical to wear gloves when handling bare or machined metal. when metal parts are touched by human hands, oils and contaminants go directly to the parts' surfaces. Packaging at this point can only help a part from getting worse. It typically cannot overcome contaminated parts; it can simply extend the time until the contamination is either seen as rust/corro- sion or hide it until the part is installed in an assembly where it continues to corrode, causing damage to the assembly. at's why it is critical to wear gloves when handling bare or machined metal. Almost all corrosion issues that have been investigated over the years have their origin in the cleaning and packing process, either through improper neutralization (pH) of the parts, particulates or fines (chips) in one or more cleaning tanks, cross-contamination of clean parts by the use of dirty rags to wipe them down, trapped water in or on parts, or oil in the compressed air (not using an oil trap on the compressed air lines). Packaging as Protection So before packaging, it is important to start with clean parts that are free of fingerprints and other contaminants. Next, determining which bag or film material is the most appro- priate for a particular part is critical. Considerations include: • Temperatures the packaging will encounter in shipment and/or storage. 2095 East Big Beaver, Suite 350 Troy, MI 48084 248.457.0023 How clean are Your Parts? How to Measure Cleanliness? Microscopic analysis of residue particles on filter membranes Fully automated analysis process Automatic recognition of metallic particles Cleanliness analysis according to ISO 16232, VDA V19

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