1. Definition of cleanliness levels

Before discussing the CO ₂ pressure cleaning process, it's essential to address the notion of cleanliness. Surface contamination exists in many forms and is present in different states on the surface of a substrate. Among the most common categories are particles, thin or molecular films, organic or inorganic bodies, ionics, and bacteriological contamination. This list can be extended to metals, chemical compounds (toxic and hazardous), and radioactive or biological particles, encountered in various industrial processes such as semiconductor production, metal machining, the manufacture of polymer objects, the nuclear industry, the pharmaceutical and medical industries, or the food industry.

The most common sources of contamination include :

machining oils and greases ;...

You do not have access to this resource.

Exclusive to subscribers. 97% yet to be discovered!

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!

The Ultimate Scientific and Technical Reference

A Comprehensive Knowledge Base, with over 1,200 authors and 100 scientific advisors

+ More than 10,000 articles and 1,000 how-to sheets, over 800 new or updated articles every year

From design to prototyping, right through to industrialization, the reference for securing the development of your industrial projects

This article is included in

Metal treatments

This offer includes:

Knowledge Base

Updated and enriched with articles validated by our scientific committees

Services

A set of exclusive tools to complement the resources

Practical Path

Operational and didactic, to guarantee the acquisition of transversal skills

Doc & Quiz

Interactive articles with quizzes, for constructive reading

Subscribe now!

Ongoing reading
Definition of cleanliness levels

Previous
page Dense phase CO2 cleaning: An alternative solution to the use of solvents

Dense fluids under pressure

Bibliography

(1) - KOHLI (R.) - Surface contamination removal using dense-phase fluids: Liquid and supercritical carbon dioxide. - In Developments in surface contamination cleaning, Elsevier, p. 2-38 (2013).
(2) - NASA Document JPR 5322.1 - Contamination...

Standards and norms

Clean rooms and related controlled environments – Part 1: Classification of air particulate cleanliness - ISO 14644-1 - 2015
Clean rooms and related controlled environments – Part 2: Monitoring the maintenance of cleanroom performance for particulate air cleanliness - ISO 14644-2 - 2000
Clean rooms and related controlled environments – Part 14: Assessment of equipment suitability for use by determining...

Regulations

Order of 11/20/17 on in-service monitoring of pressure equipment and simple pressure vessels. JO n° 282 of December 3, 2017.

Arrêté du 02/05/02 relatif aux prescriptions générales applicables aux installations classées pour la protection de l'environnement soumises à déclaration sous la rubrique n° 2345 relatives à l'utilisation de solvants pour le nettoyage à sec et le traitement des textiles ou des...