Tank Coating and Tank Lining Canada

chemical resistant coating for tanks and tank linings

Protect tanks with Tank Coating and Tank Lining

Almost all cargo tanks and storage tanks in Canada are constructed from mild steel (also known as plain-carbon steel). Steel corrodes and also needs to be protected against the carriage of aggressive cargoes. Because of  the remarkable growth of chemical industry, shipping industry carries more than 50,000 different chemical substances. Tank linings coating are real game changers in this field.

Tank Coating / Tank Lining Coating

Tank linings coating

The main challenge of chemical and product cargo tanks are the absorption of cargo substances in the tank lining. This can contaminate future cargoes because of the transportation of very small quantities of previous cargo. To prepare the cargo lining for the next cargo the tank has to be cleaned thoroughly. Cargo hold or tank linings coating helps to switch from one cargo to the next with minimal downtime.

Epoxy tank lining coating and other types

There are two main groups in which we can separate cargo tank coatings. Namely:

Organic coatings – commonly called epoxy tank lining coating
This coating is used often because of it’s excellent resistance to strong acids and alkalis. Downside is that epoxy tends to absorb significant quantities of cargo. Because of this contamination problems can occur.

Inorganic coatings, also called zinc silicates and ethyl silicates tank lining coating
The durability of this coating depends on the thickness. It is a one-layer solution with a composition of inorganic silicates pigmented with a high percentage of zinc powder.

Epoxy coating for water tank linings

All ships have potable water tanks to store potable drinking water. In Canada there are also several private and government owned water tanks. And while the tank size and type can vary, the requirements are always the same: to provide your crew with clean, fresh water. This means the tank has to be coated with a certified internal tank coating that protects the steel tank from corrosion and keeps the water inside clean.

Water tank coating for interior linings need certification in Canada per ANSI / NSF Standard 61 as well as maintenance free extended service lives.

There are a variety of solutions to meet the various application demands such as low temperature cure products, surface tolerant mastics as well as moisture tolerant coatings to meet your design and application needs. Manufacturers of epoxy coating for water tank linings are: Hempel, Sherwin Williams, 3M Jotun and Southeastern industrial linings. 

This last manufacturer has made a short video of how they coat a wastewater sewer. Watch it below:

Guidelines for internal tank coating

The durability of properly applied and maintained cargo tank coating and tank lining coating  may be over ten years. On the other hand one mistake in cargo selection may totally ruin a coating. Not only must the fabric of the tank itself be protected but contamination of the product being stored must be avoided. To meet these requirements, tank lining products must combine exceptional anti-corrosive performance with effective chemical resistance. To ensure compatibility between the tank lining and the product stored, it is essential that the chemical resistance list is consulted prior to specification. So, before you can buy your cargo tank coating or tank linings coating you need consider your vessel’s or storage tank typical cargoes and cargo sequence to ensure you get the right coating. If you need assistance with this, our coating experts are happy to help.

International paint offers an application guide called the cargo resistance guide which covers over a thousand different cargoes with advice about which coating to use. Other coating manufacturers also have special guides, like this one: PPG Tank linings storage solutions or Jotun Tank linings guide.

Tank coating

Important questions to answer about your project 

Before you can apply the tank lining coating there are 5 questions you have to keep in mind:

  1. How long will the storage be? For example: Land storage tanks are often required to store products over very long periods of time. The incorrect choice of tank lining may lead to a softening or even failure of the coating.
  2. What kind of chemicals are stored? You have to choose a lining system that is dictated by chemical resistance to the stored product.
  3. Will the storage temperature be high, normal or low? If you need to store cargo at high or low temperatures, not all coatings are suitable for high or low temperatures.
  4. What is the maximum downtime? Some coatings are faster to apply than others.
  5. Are there local restrictions or regulations? In some markets there are specific restrictions and legislation that you need to consider when specifying a lining system.
Tank coating

Coatings for cargo tanks

To ensure maximum durability of the coatings we highly recommend experienced coating experts for application in Canada. Applying cargo tank coating or tank linings coating is very complex and different cargoes require specific coatings.

Coating process

When coating a whole tank or cargo hold the process generally goes like this:

  • First the tank must be degreased and bulkheads need to be sandblasted
  • Secondly a rotating grinder grinds the tank to a bright steel finish
  • Then one or two primer coats are applied
  • Depending on the necessary film thickness three or four finishing coats are applied

Tank coating contractors in Canada

Tank internals present a unique challenge for protective coatings and prices vary for every project. There are a few major coating contractors in Canada that have all the expertise to help meet your project requirements.

International (AkzoNobel)
110 Woodbine Downs Blvd Unit #4 | Toronto| ON M9W 5S6 | Canada

Offers the following product lines:
Ceilcote for concrete and steel structures
Devoe chemical resistant lining system for multiple substrates
Polibrid for steel and concrete ( excellent for water and wastewater applications)
Interline corrosion protection and reducing cross cargo contamination.


PPG
8200 Keele St | Concord, ON L4K 2A5 | Canada

Offers the following product lines:
Amercoat for steel and concrete (also available for low temperature applications)
Novaguard for resistance to a wide range of chemicals, solvents and refined fuels and even biofuels.
Sigmaguard for esistance to crude oil up to 140ºF (60ºC), aliphatic petroleum storage with pit filling properties


Jotun
Seagulf Marine Industries Inc | 815 Mill Street | Montreal, Quebec | H3C 1Y5

Offers the following product lines:
Tankguard Plus chemical resistance at high temperatures
TG Storage  made for long term storage of chemicals
SF is solvent free.  Film thickness as low as 150µm and up to 500µm
Chemflake  is a glass flake reinforced unsaturated vinyl ester coating, fast curing

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