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D 117 Cleaning for nitriding (A: main process) ( Date: 2004-05-25 )
Turned, punched parts from suppl. to carindustry made of steel and cast are cleaned from hardly known and changing dirts (e.g. cooling lubricant, chips, oxide, scales) in a vacuum plant by mod. alcohole and aq. agent; afterw. nitriding, back to customer
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Type of cleaning : Cleaning facilities with a vapour degreasing system
Multitask equipment
Central cleaning station
Facility combining solvent and aqueous cleaning
Cleaning support : Ultrasonic devices
Charge is rotated/oszillated
Description :
Since when do you apply current cleaningsystem? : 1 / 2002
Step : 1. Flooding, 3.500 litre, 85,0 ░C, 5,0 min, (DOWCLENE 1601)
2. Vapour-phase degreasing, 85,0 ░C, (DOWCLENE 1601)
3. Vacuum drying, 20,0 ░C, (No agent)
Duration of cleaning process for one part (min.) : from: 20,0 until: 60,0
Duration of cleaning process for the charge (min.) : from: 20,0 until: 60,0
How often is the cleaning done (per day) : 20,0
Further treatment : heat treatment
Hardening
Nitriding
Surface requirements : free of oil and grease
dry
Precision cleaning
Description: Ready for nitriding, ca. 38 mN/m
Quick tests Quick technical test for fatty/oily soiling
Test inks
Advanced tests : No statement
Quality of cleaning : very good
Company evaluation of cleaning process in general : very good
Comment :
Incidences : No statement from company
Working environment : No statement from company
Protection equipment : gloves
goggles
Covered / closed plant


Evaluation by company personnel
Occupational safety and health : good
Environment protection : good
Cleaning time : good
Waste management : very good
Cleaning quality : very good