“I am looking for a temporary coating for carbon steel and stainless steel weld joints on tanks. (The tanks are used for transporting radioactive materials.) The coating is removed once a year in order to inspect the welds, then recoated. The coating should have good exterior durability and resistance to corrosion. Do you think that one of your strippable coatings might work in this application? Drying time is not an issue. The tanks are currently coated with a 2K polyurethane system. The welds are masked and coated later. Drying time can be whatever is required by the coating. Solventborne is acceptable. My main concern is that the coating has the required durability (one year maximum). I realize it’s somewhat contradictory to expect good performance, which requires good adhesion, but have the coating easily removable. Removal with alkaline solution would be acceptable also.”
Our Recommendations: Use our Boothcoat 5201
“I am searching for an acid resistant coating that can be applied via brush in our manufacturing process to mask specific regions on our product during chemical etch. After the etch process we then want to remove the coating COMPLETELY leaving absolutely no trace residue. (A post process solvent wipe to remove any material would be acceptable.) The base materials can be: SS304, Rhenium, Tungsten or Molybdenum.
The acids that the material will have to resist are dependent on the base material and may involve a secondary exposure via immersion in one or more of the below acids:
1. Hydrogen peroxide (50%) plus Ammonium hydroxide (50%)
2. Nitric Acid (50%)
3. Hydrofluoric Acid (30%) plus Nitric Acid (20%)
4. Hydrochloric Acid (50%)
5. Hydrochloric Acid (75%) plus Nitric Acid (25%)
6. Sulfuric Acid (15%)
7. Sodium Hypocloride (100%) The immersion times in these acids can range from 10 to 30 minutes.
The temperatures at which these processes can be performed are: Room Temp, 100°C or 200°C
Can you provide me with a product that meets these requirements? Thank you.”
Our Recommendations: Coscoat 4300 is a solvent based product formulated for brushing with maximum film built. This product was tested overnight at 100C in sulfuric, phosphoric, hydrochloric and nitric acids. Coscoat 4300 applied to 2 1/2 mils of dry film protected the metal substrate and peeled with ease. The product was tried over bare aluminum, cold rolled steel, stainless steel and lead
“Greetings. We are one of the largest manufacturer of Wind Mill Manufacturers and have come across your product through site.
We would like to apply these coatings on our Rotor Blades. Which would act as a cover during transportation and would be peeled off once it reaches destination and is ready for installation?”
Our Recommendations: Our Windocoat product will meet your requirement.
“I have very urgent question to you about the product. Can I use it to coat LNG pipelines? I proposed the products to KOGAS which is one of our big customers. Because this company is government owned company, they maintain all LNG pipelines in Korea. I suggested them to use our product on their pipeline flange to seal and monitor its leaking.” – Customer from Korea
Our Recommendations: I would recommend the WindOcoat 4880 for liquefied natural gas lines. The coating must be applied when the flange and pipe are at a temperature of 10 degrees C or above or it will not cure properly. Once cured it should withstand the cold temperatures of LNG as well as Korean winters. If a flange springs a leak the coating will likely turn from blue to white or cloudy due to the high degree of moisture in natural gas. We can supply the WindOcoat in a clear version.
Standard air assisted, or airless spray equipment, Brush or Roller (Use lambs wool roller).
Apply to achieve a minimum wet film thickness of 250 microns = 100 microns DFT (dry film thickness). IT IS VERY IMPORTANT TO ACHIEVE AN EVEN DFT OF MIN 100 MICRONS. As anything less may result in the film becoming difficult to remove.
Try to avoid ‘feather edges’ or areas where it is applied thinly. In order to achieve a defined edge it may help to apply masking tape, roller up to and over the tape and remove tape while BoatPeel Peelable coating is still wet.
The strippable coating should be applied at around 150 microns min. DFT or heavier over rough surfaces or areas of heavy foot traffic.
If the dry film rips or tears, the flap may be lifted and resealed by applying a fresh wet coat to the underside and resealing. Alternatively, cut away flap and re-apply fresh coating, it will bond to itself.
External Weather Resistance:
Long-term exposure to sunlight will cause premature deterioration and brittleness of the film. Exposure to water after the film is dried will soften the film but it will recover once it dries. Avoid traffic over the wet or while the film is wet. If components are to be stored externally for several weeks we recommend the application of acrylic topcoat which will protect for 12 months and more.
It is critical that Peelable coating film is allowed to cure dry. Drying time will vary according to humidity, temperature and weather condition. The evaporation of water will be speeded by air movement and warmth supplied by natural and mechanical means.
BoatPeel is a temporary protective Peelable coating and adhesion is low.
Once completely dry is resistant to water and solvent and acts as a mask against sprayed emulsion paints, lacquers, oil or grease and water.
The dry strippable coating film can be easily removed either by hand stripping or other means. Peelable coatings are thermoplastic. Do not try to remove in freezing conditions-becomes brittle in freezing condition.
Is a water-based product and you can clean spray equipment and brushes with water. Do this immediately before peelalbe coating starts to dry.
General Chemical has a complete line of Peelable Masks to meet your challenging requirement. If we do not have something to meet your specific requirement, than we will develop it by working with you to meet that need for strippable coating.