M-CHEM 401 – Acid Resistant High Temperature Coating – Extended Cure

M-CHEM 400 – Chemical Resistant High Temperature Coating.

is a solvent free coating utilising the latest novolac polymer technology. The material provides excellent chemical protection for applications subject to high service temperatures. The products designed for the long-term protection of steel and concrete surfaces subject to constant chemical immersion at elevated temperatures.

Once cured

M-CHEM 400 – Chemical Resistant High Temperature Coating

 is capable of withstanding temperatures up to 90°C continuous immersion, dependent on chemical contact but is proven to protect against 98% Sulphuric Acid at 75°C, 36% Hydrochloric Acid at 50°C and 40% Phosphoric Acid at 60°C

APPLICATION GUIDE
TECHNICAL DATA
MSDS
CHEMICAL RESISTANCE
APPLICATION GUIDE

M-CHEM 400 – Chemical Resistant High Temperature Coating is a high build solvent-free high functionality epoxy novolac coating designed to provide outstanding chemical and corrosion protection of steel and concrete structures at elevated temperatures.

The coating has been designed to be applied using heated plural feed spray equipment and once cured will resist high concentration chemicals such as 98% sulphuric acid at immersion temperatures up to 75°C.

Product Features

• Solvent free epoxy novolac coating
• Applied in a single coat using heated plural feed spray equipment
• Resistant to 98% sulphuric acid & 36% hydrochloric acid at 75°C in immersion conditions

Typical applications

• Chemical containment
• Tank lining & process vessels
• Chemical drains and channels
• Internal pipe surfaces
• Chemical Sumps

Surface Preparation

Metal Surfaces

1. All oil and grease must be removed from the surface using an appropriate cleaner such as MEK.
2. All surfaces must be abrasive blasted to ISO 8501/4 Standard SA2.5 (SSPC SP10/ NACE 2) minimum blast profile of 75 microns using an angular abrasive grit.
3. Once blast cleaned, the surface must be degreased and cleaned using MEK or similar type material.
4. All surfaces must be coated before gingering or oxidation occurs.

PLEASE NOTE: For salt contaminated surfaces the substrate must be pressure washed with clean water and checked for salt contamination, please refer to the surface preparation and pre-application guide for further information

Existing Concrete

1. If the concrete surface is contaminated, pressure wash using clean water.
2. Once the concrete is dry, lightly abrasive blast or scarify taking care not to expose the aggregate.
3. Clean all dust and debris from the surface and prime with M-PRIME 100 – Low Viscosity Epoxy Concrete Primer or M-PRIME 104 – Damp Tolerant Concrete Primer
4. Apply MAXPRIME 100CS at target WFT of 150 microns, leave to cure for 3 hours (20°C) before overcoating.

New Concrete

1. Allow new concrete to cure for a minimum of 21 days and treat to remove any surface laitance.
2. Check the moisture content of the concrete prior to coating (8% moisture content or below).
3. Lightly scarify the surface taking care not to expose the aggregate.
4. Clean all dust and debris from the surface and prime with Maxprime 100CS (low viscosity epoxy primer).
5. Apply Maxprime 100CS at 150 microns WFT, leave to cure for 3 hours 20°C before overcoating.

Mixing & Application

Prior to mixing please ensure the following:

1. The base component is at a temperature between 25°C.
2. The ambient & surface temperature is above 10°C.
3. The ambient & surface temperatures are not less than 3°C above the dew point.

Brush or Roller Applications

1. Pour the mixed material into a paint kettle or paint tray (this will maximise the usable life)
2. Using a 50mm wide synthetic brush, stripe coat all edges, joints, corners and equipment with the mixed material. The stripe coat must be approximately 100mm wide, at 500 microns wet film thickness.

3. Once the stripe coat has cured sufficiently and is capable of being overcoated, apply the 1st coat of mixed product to all surfaces at 500 microns wet film thickness.
4. Once the 1st coat of material has cured sufficiently, approximately 8 hours at 20°C, apply a 2nd coat of material to all surfaces at 500 microns wet film thickness.

Spray set up & Application

1. Spray application should be carried out by heated plural feed spray rig.
2. The temperature of the base component should be kept around 35°C.
3. Spray pressure of 3600psi and a tip size of 19-23 thou should be used.
4. Using a 50mm wide synthetic brush, stripe coat all edges, joints, corners and equipment with the mixed material. The stripe coat must be approximately 100mm wide, at 400 microns wet film thickness.

5. Once the stripe coat has cured sufficiently and is capable of being overcoated, apply MAXCHEM 400EC to all surfaces at 1000 microns wet film thickness.

Coverage Rates

16ltr of fully mixed product will give the following coverage rates – 16m² at 1000 microns.

Please note that the coverage rates quoted are theoretical and do not take into consideration the profile or condition of the surface being repaired.

Cure Times

At 20°C the applied materials should be allowed to harden for the times indicated below. Before being subjected to the conditions indicated. These times will be extended at lower temperatures and reduced at higher temperatures:

• Usable life 15 minutes
• Minimum overcoating time 4 hours
• Maximum overcoating time 12 hours
• Water/ sea water immersion 4 days
• Chemical immersion 7 days

For Optimum Performance

After an initial curing period of at least 12 hours at 20°C. Raising the cure temperature progressively to 60 – 80°C for up to 8 hours will result in improved mechanical, thermal and chemical resistance properties.

Pack Sizes

This product is available in the following pack sizes 4ltr & 16ltrs.

Colour

• Base component – Grey or Red
• Activator component – Amber

Over-coating times

• Minimum – the material can be over-coated as soon as it is touch dry, approximately 4 hours at (20°C).
• Maximum – the over-coating time should not exceed 12 hours.
• Where the maximum over-coating time is exceeded, the material should be allowed to harden before being abraded or flash blasted to remove surface contamination.

Storage Life

5 years if unopened and store in normal dry conditions (15-30°C).

Health and Safety Information

Please ensure good practice is always observed. Protective gloves, goggles & disposable coveralls must be worn during the mixing and application of this product.

Before mixing and applying the material ensure you have read the fully detailed Safety Data Sheets.

MAXCHEM 400EC – Activator MSDS                           MAXCHEM 400EC – Base MSDS

Legal Notice

The data contained within this Technical Data Sheet is furnished for information only and is believed to be reliable at the time of issue.

We cannot assume responsibility for results obtained by others over whose methods we have no control. It is the responsibility of the customer to determine if the product is suitable for use. Maxkote Ltd accepts no liability arising out of the use of this information or the product described herein

TECHNICAL DATA

MAXCHEM 400 – CHEMICAL RESISTANT HIGH TEMPERATURE COATING

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MSDS

MAXCHEM 400 – CHEMICAL RESISTANT HIGH TEMPERATURE COATING

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CHEMICAL RESISTANCE

MAXCHEM 400 – CHEMICAL RESISTANT HIGH TEMPERATURE COATING

When used according to the procedures detailed in the Application Guide and Technical Data Sheet for the material. The product resists attack by a wide variety of concentrated inorganic acids, alkalies, salts and organic media

MAXCHEM 400 (post-cured) offers excellent resistance to the following chemicals when tested at the temperatures indicated:

98% Sulphuric Acid 75°C
75% Sulphuric Acid 90°C
50% Sulphuric Acid 90°C
25% Sulphuric Acid 90°C
36% Hydrochloric Acid 50°C
10% Hydrochloric Acid 50°C
40% Phosphoric Acid 60°C
20% Phosphoric Acid 60°C
5% Nitric Acid 50°C
40% Sodium hydroxide 90°C
20% Sodium Chloride 90°C

In addition the product offers excellent resistance to the following chemicals when tested at 20°C:

Chromic 10%
Hydrobromic 40%
Hydrochloric 36%
Nitric 10%
Nitrous 10%
Phosphoric 75%
Sulphuric 98%
Acetic 10%
Carbonic 30%
Citric 30%
Folic 20%
Formic 10%
Lactic 10%
Ammonium hydroxide 30%
Potassium hydroxide 20%
Sodium hydroxide 40%
Sodium Bisulfate 40%
Butanol 100%
Ethanol 100%
Ethylene glycol 100%
Hexanol 100%
Propylene glycol 100%
Aniline 100%
Diethanolamine 100%
Hydrazine 100%
Methylamine 40%
Cyclohexane 100%
Hexane 100%
Octane 100%
Benzene 100%
Naphtha 100%
Toluene 100%
Xylene 100%

For more detailed information on chemical resistance for this product, do not hesitate to CONTACT US!