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THE USE OF CHLORINATED SOLVENTS AS WASHING AGENTS IN THE METALAND STEEL INDUSTRIES, AND PARTICULARLY IN THE PRODUCTION OF BRASS POINTS FOR WRITING INSTRUMENTS, WITH ASSOCIATED PROBLEMS

I - Chlorinated solvents as washing agents

Introduction
 Chlorinated solvents and related problems
Chloroethanes
Chloroethylenes
Chloromethanes
Cleaning Processes
Ultrasound degreasing
Main features
Precautions
Thermal decomposition
Evaporation
Storage
Distillation
Regenerated solvents
Checks
Toxicity
Production control

II - Related problems

Production and utilisation of tips for ball-point pens
Writing blocking
Metal enrichment into the ink in contact with brass parts
Nature of clots thats obstruct duct in ball pen tips
Verification of results and conclusions

III - Photographic examination

Photographic examination and subsequent discussion.
Picture n. 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 -
15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24

IV -
Report of the meeting

Report of the meeting held on June 4
Opening speech
Problem analysis
Analysis methodology and final results
Introduction to chlorinated solvents
Attentive use of chlorinated solvents
Importance of the equipment used for washing parts
Corrosion of machined but unwashed parts
Can the ink pH play an important role in corrosion?
Picture n. 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 -
33 - 34 - 35 - 36 - 37
Conclusion