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Lining Concrete Ground Storage Tanks in Cold Weather: How New Coating Technology can Reduce Issues Related to Solvent Entrapment and Amine Blush

Lining Concrete Ground Storage Tanks in Cold Weather: How New Coating Technology can Reduce Issues Related to Solvent Entrapment and Amine Blush
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Concrete ground storage tanks for potable water can often times be large. This can make lining them a difficult task, especially when temperatures are cold. To minimize disruptions to water delivery to their customers, many municipalities like to schedule lining work in potable water storage tanks during low usage time, which coincide with colder temperatures. 

Product Number: 51220-234-SG
Author: Cory Brown
Publication Date: 2020
Industry: Coatings
$0.00
$20.00
$20.00

Concrete ground storage tanks for potable water can often times be large. This can make lining them a difficult task, especially when temperatures are cold. To minimize disruptions to water delivery to their customers, many municipalities like to schedule lining work in potable water storage tanks during low usage time, which coincide with colder temperatures. Because concrete is notorious for cracks, it is common for lining selection to include flexible materials such as aromatic polyurethanes for these ground storage tanks. These polyurethanes linings require epoxy primers to reduce the effects of outgassing. Cold temperatures can be at the root of a host of problems related to the adhesion of polyurethane linings to their epoxy primers. These include slow solvent evaporation and increased cure times. Increased cure times leave the primer susceptible to effects of moisture which can lead to amine blush. Solvent entrapment and amine blush are probably the two most common causes of adhesion problems between epoxy primers and polyurethane linings. In order to avoid these concerns, the coating industry has developed a new kind of primer. Cementitious water based epoxy primers are immune to solvent entrapment and amine blush. These innovative products perform the same function as their solvent borne predecessors in that they reduce the effects of outgassing, and they are able to do so without the risks associated with cold weather applications.

Concrete ground storage tanks for potable water can often times be large. This can make lining them a difficult task, especially when temperatures are cold. To minimize disruptions to water delivery to their customers, many municipalities like to schedule lining work in potable water storage tanks during low usage time, which coincide with colder temperatures. Because concrete is notorious for cracks, it is common for lining selection to include flexible materials such as aromatic polyurethanes for these ground storage tanks. These polyurethanes linings require epoxy primers to reduce the effects of outgassing. Cold temperatures can be at the root of a host of problems related to the adhesion of polyurethane linings to their epoxy primers. These include slow solvent evaporation and increased cure times. Increased cure times leave the primer susceptible to effects of moisture which can lead to amine blush. Solvent entrapment and amine blush are probably the two most common causes of adhesion problems between epoxy primers and polyurethane linings. In order to avoid these concerns, the coating industry has developed a new kind of primer. Cementitious water based epoxy primers are immune to solvent entrapment and amine blush. These innovative products perform the same function as their solvent borne predecessors in that they reduce the effects of outgassing, and they are able to do so without the risks associated with cold weather applications.

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Picture for Lining Below Grade Concrete
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Lining Below Grade Concrete

Product Number: 51220-227-SG
Author: Matt Apsley
Publication Date: 2020
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What  exactly  is  involved  when  designing  and  installing  a  liner  for  concrete  structures below  grade?  Does  the structure  need  to  be  damp proofed?  What  testing  protocols  should or shouldn't  be  specified  and when should they  be  performed.  What  type  of  surface  prep should be done  and  why  is  surface profile  so  important?  What  type of  liner  has  the  best  performance properties  for  below  grade  concrete?  Why  liner  curing  time, thickness  and  resistance  to moisture is  important.  These are several  questions  that  should  be  answered when beginning  to specify  a lining  project 
Why Epoxy Coatings are the Most Practical Lining Material for Municipal Manhole Rehabilitations Where Elevated Levels of H2S/Sulfuric Acid are Present
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Why Epoxy Coatings are the Most Practical Lining Material for Municipal Manhole Rehabilitations Where Elevated Levels of H2S/Sulfuric Acid are Present

Product Number: 51220-231-SG
Author: Timothy Bauman
Publication Date: 2020
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 In our world of protective coatings, water usually seems to cause trouble. In relation to coating concrete - determining how wet the manhole structure is paramount in our struggle to rehabilitate these manholes. And we are not talking about the manholes used to contain water during heavy rains or floods, strictly the sanitary manholes. A few ASTM test methods are important tools.
The Correlation of Appearances of Appearances of Changes and Long term Corrosion Protection for Aromatic Polyurethane Coatings Used on Steel Water Pipes
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The Correlation of Appearances of Appearances of Changes and Long term Corrosion Protection for Aromatic Polyurethane Coatings Used on Steel Water Pipes

Product Number: 51220-237-SG
Author: S. G. Croll, C. Gu, V. Upadhyay, B. D. Keil
Publication Date: 2020
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Aromatic polyurethane coatings are often used in the protection of steel water pipelines from corrosion. Unfortunately, pipeline sections may be stored above ground for many months before installation so the coatings yellow, lose gloss and can chalk. This deterioration in appearance naturally creates doubt about the corrosion protective qualities of the coatings.
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