USE: Operate at a dilution of 15-20% depending upon the degree of corrosion protection required. Fill the mild/stainless steel tank three-quarters full with warm water and add Blackfast 933 slowly whilst mixing vigorously.

APPLICATION: Following the water rinse immediately after the blacking operation, the components are immersed in the tank of Blackfast 933 either in a basket or suspended individually for five minutes. Agitate small items and rotate those with complicated shapes. They are then placed on a draining board.

To accelerate the drying time and improve the quality of the corrosion preventative film, operate the bath at 60o-70oC. Allow 45 minutes drying time before handling the components. Tests indicate that corrosion protection improves dramatically if components are dried quickly at elevated temperatures 5-10 minutes at 80oC. Strong air currents should not be used as they blow the emulsion off the item.

The solution should be agitated during use.

TANK MAINTENANCE: The bath level needs to be topped up every day to replace water losses due to evaporation. In hard water areas the life of the bath will be extended by using demineralised water. Viscous scum will need to be removed regularly.

The operating life of the bath will be determined by the amount of work processed and can be dramatically shortened if a quantity of blacking solution is 'carried over' into the bath. An exhausted bath is indicated by a rapid increase in solution viscosity to a consistency of yoghurt. The solution will then need to be replaced.

SOLUTION STRENGTH CONTROL: Fill a 100cc graduated measuring cylinder with 90cc of Blackfast 933 emulsion to be determined. Add 10cc of 1 molar aqueous hydrochloric acid and shake the cylinder for 1 minute. Allow the cylinder to stand overnight. The following day determine the amount of separated oil in ml. The % concentration by volume then = ml of separated oil x 100/90.

Addition of new Blackfast 933 should be made by pre-mixing a concentrated solution of equal parts of 933 and warm water. This emulsion is added to the tank whilst mixing.

Shelf life of the concentrate solution at ambient temperature: 1 year.

Blackfast 933 water-based corrosion preventative is part of the Blackfast range of products for the chemical blacking of iron and steel at room temperature.

Blackfast Chemicals continues to improve the quality and performance of its range of products and reserves the right to modify product formulations without prior notice

SAFETY DATA:

1. IDENTIFICATION OF THE SUBSTANCE/PREPARATION AND OF THE COMPANY

PRODUCT NAME: BLACKFAST 933 WATER-BASED CORROSION PREVENTATIVE
APPLICATION: Rust preventative
COMPANY: Blackfast Chemicals
ADDRESS: 78 Coombe Road, New Malden, Surrey KT3 4QS, England
TEL/FAX NO'S: Tel: 0208-336 2900 Fax: 0208-336 0909

2. COMPOSITION/INFORMATION ON INGREDIENTS

COMPOSITION: Highly refined mineral oil, emulsifiers and additives.
HAZARDOUS INGREDIENTS: This product contains ingredients classified as hazardous. However, they are NOT present in sufficient quantities to warrant classifying the product as hazardous Methylene-bis-oxazine.
SYMBOL: Xn
RISK PHRASES: R22, 36/38, 40
CAS No: 5625-90-1

3. HAZARDS IDENTIFICATION

This product is NOT classified as hazardous.

4. FIRST AlD MEASURES

EYES: Irrigate immediately with copious quantities of water for several minutes. Obtain medical attention if irritation persists.
SKIN: Wash thoroughly with soap and water or suitable skin cleanser as soon as possible.
INHALATION: Remove from exposure.
INGESTION: Obtain medical attention urgently. Do NOT induce vomiting. Wash out mouth with water.

5. FIRE FIGHTING MEASURES

Suitable extinguishing Media: CO2, powder, foam or water.
Special exposure hazards: None
Special Protective Equipment: None

6. ACCIDENTAL RELEASE MEASURES

PERSONAL PRECAUTIONS: Spilt product presents a significant slip hazard.
ENVIRONMENTAL: Prevent entry into drains, sewers and water courses.
DECONTAMINATION: Soak up with inert absorbent or contain and remove by best available means.

7. HANDLING AND STORAGE

Handling: No special precautions
Storage: Protect from frost. Store out of direct sunlight. Store between ( C): 5-50
TA-Air/Appendix E (class): III
Water Endangering Class: 2 Classification according to German regulations for preparations.
VbF: None

8. EXPOSURE CONTROLS/PERSONAL PROTECTION

Formaldehyde (formed in solution) MAK-Value none, Trk-Value 0.5ppm
Local exhaust ventilation is recommended. Mechanical methods to minimise exposure must take precedence over personal protective measures.

Personal protection: Avoid skin and eye contact. Avoid breathing spray mist. Wear impervious gloves (eg of PVC), in case of repeated or prolonged contact. Change contaminated clothing and clean before re-use. A high standard of personal hygiene is essential.

9. PHYSICAL AND CHEMICAL PROPERTIES

APPEARANCE: Brown liquid
ODOUR: Mild
PH (working dilution): 9.2
BOILING POINT ( C): Not determined
FLASH POINT (closed C): Above 150
AUTOIGNITION ( C): Above 230
EXPLOSIVE PROPERTIES (%): Lower explosive limit (LEL.%): 0.6, Upper explosive level (UEL.%): 6.5
VAPOUR PRESSURE (kPa at 20 C): Below 0.1
RELATIVE DENSITY (AT 20 C): 950 kg/m3
WATER SOLUBILITY: miscible
VISCOSITY (40 C): 70mm2/sec

10. STABILITY AND REACTIVITY

STABILITY: Stable, will not polymerise
CONDITIONS TO AVOID: Temperatures ( C) above 100
MATERIALS TO AVOID: Strong oxidising agents. Strong acids.
HAZARDOUS DECOMPOSITION PRODUCTS: None. Above 250 C: Irritant fumes.

11. TOXICOLOGICAL INFORMATION

The following toxicological assessment is based on a knowledge of the toxicity of the product's components.
Expected oral LD 50 rat>2g/kg. Expected dermal LD 50, rabbit>2g/kg
EYES: May cause transient irritation
SKIN: May defat the skin.
INHALATION: Mist and vapours may cause irritation to nose and respiratory tract.
INGESTION: May cause nausea, vomiting and diarrhoea.
CHRONIC: Repeated and prolonged skin contact may lead to skin disorders.
OTHER: None known.

12. ECOLOGICAL INFORMATION

Environmental Assessment: When used and disposed of as intended, no adverse environmental effects are foreseen.
Mobility: Liquid. Emulsifiable in water.
Persistence and Degradability: Not readily biodegradable, but is inherently biodegradable.
Bioaccumulative Potential: Not bioaccumulative based on logP values of constituents.
Ecotoxicity: Not expected to be toxic to aquatic organisms.
Other information: None.

13. DISPOSAL INFORMATION

Disposal must be in accordance with local and national legislation. Dispose through an authorised waste contractor to a licensed site.

14. TRANSPORT INFORMATION

This product is NOT classified as dangerous for transport.

15. REGULATORY INFORMATION

This product is a preparation and is NOT classified according to EEC Guideline 88/379
EC Directives: Dangerous Preparations Directive, 88/379/EEC; Safety Data Sheet Directive, 91/115/EEC; Framework Waste Directive, 91/156/EEC

16. OTHER INFORMATION

The information given is based on current knowledge. Products are described in terms of their safety data. The data does not signify any warranty with regard to the products' properties.
The product should only used for the stated application or applications. Use of the product for applications other than as stated in the sheet may give rise to risks not mentioned in this sheet.
Further information relating to the use of the product can be obtained from the technical data sheets.