ALOCROM 1200 PDF

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Alocrom gives excellent protection against corrosion to both painted and Alocrom is ideal for coating all types of aluminium and. Technical Sheet ALOCROM A process which forms a protective iridescent golden coloured conversion coating on aluminium and its alloys. Outside the. BRUSH ALOCROM MP/5. Sheet No. MP/1. PART A – MP PART B – MP FEATURES: A two pack liquid chemical system which will.


Alocrom 1200 Pdf

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Alocrom is a Chromate conversion coating chemically applied to aluminium foodstuffs. Alocrom produces protective coatings on aluminium and its alloys. Brush Alocrom A. Intended use: Product for the conversion treatment of metals. Company name: Henkel Limited. Technologies House. Brush Alocrom B. 1. Identification of the substance/preparation and of the company/undertaking. Trade name: Brush Alocrom B.

Although Alocrom can be used as a standalone process, it is most often used to form a foundation for paint and powder coating due to its excellent adhesion characteristics.

Get medical attention if irritation or a skin rash develops. It is not usually necessary to heat the tank but if the temperature of the shop is likely to fall below 18 C 65 Fa steam coil or electric immersion heater should be fitted to the tank.

Do not allows rags, sponges, paper or alodrom organic matter which aoocrom become contaminated with Alocrom to dry out as this may constitute a fire hazard.

alocrom 1200

The contact electrical resistance is less than micro-ohms per square inch measured under an applied electrode pressure of pounds per sq inch. Hygroscopic which means it can absorb. I said I would look into this. Product and company identification Trade name of product Product use Product dilution information: Permission for classroom use provided original copyright is included. Due to that, the provided below detailed instruction is for restoration of the bath tubs.

There is no restriction on the stoving temperature of paint or other organic coatings applied over the Alocrom. Identify the major parts of the arc welder.

Bath Strength Titration: 5. PROCESS

Short Immersion Time Alocrom requires only a few minutes for coating formation. Tools within general industrial work Electrical components Household appliances Car parts Aerospace components Dorsetware provides alocrom chrome conversion coating at our Poole facility in Dorset. Details of a simple effluent treatment method will be supplied on request.

The users must satisfy themselves that there are no circumstances requiring additional information or precautions or the verification of details given herein.

A blue-black colour will be obtained. Continue the titration to the colourless end point. Add 2 kg of Alocrom powder per litres of bath for each cm 3 below the required value.

If the coating takes longer to form than normal and is lighter coloured or non-adherent, this indicates that the ph is rising and it should be lowered by adding concentrated nitric acid when replenishing the bath.

The amount of nitric acid added must be kept as low as possible and the maximum must not be exceeded. After each addition of acid, wait for several hours before adding more acid to ensure the bath has reached equilibrium. If preferred, the ph can usually be lowered by increasing the Alocrom concentration rather than adding concentrated nitric acid.

Technical Process Bulletin. Alocrom 1200

To do this add Alocrom in 1 gram per litre increments until consistent coating are obtained. The total Alocrom concentration must not exceed 14 kg per litres which corresponds to a titration of 7 cm 3. Once the optimum operating strength for a particular plant has been established, the bath should be maintained at that strength by small additions of Alocrom powder as indicated by titration.

Rinse where necessary.

If the oxide skin is very light no further precleaning is required. However, if the oxide skin is heavier eg. After removing the work from the bath allow it to drain over the tank for 15 seconds. This will avoid unnecessary contamination of the rinse and reduce drag out losses.

Typical coating weights are in the range 0.

If the coating does not form or is too light or too iridescent, the cause may be one or more of the following: a. The bath temperature is too low for the immersion time. The immersion time is too short.

The concentration of the bath is too low. The ph of the bath is too high. Heat treatment residues or an oxide layer on the metal surface are preventing coating formation, these can be removed with Deoxidiser see relevant Data Sheet for details.

The bath has been overheated. This can permanently upset the chemical balance of the solution. The bath has become contaminated with phosphates, sulphates, etc. If the coating is too heavy or dark, the causes may be one or more of the following: a. The bath temperature is too high for the immersion time.

The immersion time is too long. The concentration of the bath is too high. The ph of the bath is too low. If the coating is powdery, the cause may be one or more of the following: a.

The bath has become contaminated. The surface oxide has not been adequately removed. Treat with Deoxidiser. If any sludge accumulates and begins to interfere with the processing, the bath should be cleaned out.

To do this allow the sludge to settle, siphon or pump the clear solution into the emptied rinse tank and discard the sludge. Wash out the Alocrom tank and return the solution.

Fill the bath up to its operating level with water and add Alocrom to bring the bath to its working strength.

Alocrom baths have a very long life and for all practical purposes need never be discarded. This can permanently upset the chemical balance of the solution. The bath has become contaminated with phosphates, sulphates, etc. If the coating is too heavy or dark, the causes may be one or more of the following: a. The bath temperature is too high for the immersion time. The immersion time is too long. The concentration of the bath is too high.

The pH of the bath is too low. If the coating is powdery, the cause may be one or more of the following: a. The bath has become contaminated. The surface oxide has not been adequately removed. Treat with Deoxidiser. If any sludge accumulates and begins to interfere with the processing, the bath should be cleaned out. To do this allow the sludge to settle, siphon or pump the clear solution into the emptied rinse tank and discard the sludge.

Wash out the Alocrom tank and return the solution. Fill the bath up to its operating level with water and add Alocrom to bring the bath to its working strength. Alocrom baths have a very long life and for all practical purposes need never be discarded. The rinse water flowing to drain will contain a low concentration of chromates hexavalent chromium.

Details of a simple effluent treatment method will be supplied on request. If the work it to be painted, rinse finally in deionised water, or alternatively mains water containing Deoxylyte see the relevant Product Data Sheet for details.

To help dry the work this rinse can be heated to C. Deoxylyte in the final rinse counteracts the effects of any hardness in the final rinse water and improves the corrosion resistance. Alternatively, Alocrom can be used for the same purpose. Add grams of Alocrom per litres of final rinse. The pH should be Deionised water may be required to achieve this pH. The final rinse must be kept clean and it should be renewed once a day or, for continuous production, once a shift.

Chromate Conversion Coatings

Use deionised or distilled water for final rinse make-up if possible. Oven drying speeds up production and a peak metal temperature of 70C is recommended.Operators should wear cotton gloves when handling freshly treated work.

The contact electrical resistance is less than micro-ohms per square inch measured under an applied electrode pressure of pounds per sq inch. A well ventilated oven for drying the work if required.

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At higher temperatures, there may be some loss of corrosion resistance, particularly on copper bearing alloys or where articles are to be left unpainted.

It should be used on aluminium wherever maximum corrosion resistance is required, and is suitable for articles which are to be painted or left unpainted. The rinse water flowing to drain will contain a low concentration of chromates hexavalent chromium.

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