PRESS RELEASE: Choosing the Right Cortec® Coatings for Tank Maintenance and Corrosion Protection

Tanks and tank farms are everywhere in the industrial world. Many tanks are used to store liquids. Others are used for mixing, dipping, or cleaning. Coatings are typically needed to protect the metal surfaces from rusting and provide a good appearance. Some environments demand more protection than others. It is therefore imperative to select the appropriate coatings system for specific tank conditions. The following examples provide guidelines for users of Cortec® Coatings.

tank maintenance corrosion protection

Coating Outdoor Tanks

Surface prep prior to coating is imperative for any tank, especially those with rusty or dirty surfaces. Painters can either sandblast rusty surfaces to white metal or (in situations where this method is not preferred or allowed) remove loose rust and scale and then apply CorrVerter®, a water-based primer that converts the rust into a passive layer. Outdoor tanks usually need the most external protection because of exposure to rain, sun, and other harsh weather conditions. For tanks in these environments, Cortec® recommends priming tank exteriors with VpCI®-396 corrosion inhibiting primer followed by VpCI®-384 2K corrosion inhibiting topcoat. Using two coatings of VpCI®-396 primer instead of just one will add greater longevity to the system if the user has the time and budget to do so. 

Storage tank internals have different requirements as they will not be exposed to much, if any, UV light, but they will be exposed to liquids. VpCI®-395 is a good choice for priming the interior walls and floors of many such storage tanks. This 2K epoxy coating brings corrosion inhibitors close to the metal surface and is good for immersion conditions. A nice advantage for workers applying VpCI®-395 in a semi-confined space is that it is water-based and has a low VOC of 0.2 lbs/gal (24 g/L). If desired, VpCI®-395 can be used as its own topcoat for extra durability since tank internals are typically not exposed to UV light. The recommended dry-film thickness (DFT) is 1.5-3.0 mils (37.5-75 µm) per coat.

Another important consideration for tank internals is the filling procedure. In many tanks, liquids are pumped in from the top. If the tank is large, the force of a liquid falling—for instance—50 feet (15 m) could chip the paint off the tank floor. Therefore, it is sometimes necessary to apply an 11.0-13.0 mil (275-325 µm) coat of VpCI®– 2026 over VpCI®-395 on the tank bottom for better impact resistance.

Coating Indoor Tanks

Indoor tanks are a different story because they are not exposed to sun or outdoor weather and often serve a different function than storage. Milder conditions make it easier to opt for a full water based-system, such as VpCI®-395 and EcoShield® VpCI®-386 for tank exteriors. As with outdoor tanks, adding a double coat of primer will help the coating system last longer and likely increase time between routine painting jobs. Mixing tanks at a manufacturing plant are often not coated internally; however, tanks that hold strong chemicals such as sulfuric acid may require a strong chemical resistant system such as VpCI®-395 and VpCI®-2026.

Ongoing Tank Maintenance

As with almost any industrial asset and fixture, tanks need special attention to keep them in good condition and protect them against sometimes harsh conditions. External and internal coating can be an important part of that routine maintenance both for appearance and metal preservation. Coating needs can vary from tank to tank, so be sure to contact Cortec® for specific recommendations on your application!

Keywords: tank coatings, corrosion protection, metal preservation, Cortec Coatings, tank maintenance, internal tank coatings, external tank coatings, rusty tank surface prep, chemical resistant coating, water-based coatings

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NEWS ALERT: Biobased Alternatives to Methylene Chloride Paint Strippers

This year, the EPA proposed banning most uses of methylene chloride, mentioning the availability of alternative products that do not include this extremely dangerous chemical. In light of tightening regulations and the obvious hazards of methylene chloride (a chemical often used in industrial paint strippers) Cortec® invites those seeking alternative products to consider trying EcoLine® 4320 or 4330 for their next paint removal task.

paint strippers

Eliminating Methylene Chloride and NMP

Cortec® introduced EcoLine® 4320 and 4330 five years ago, as more retailers were pulling paint strippers containing methylene chloride and N-methylpyrrolidone (NMP) off the shelf. EcoLine® 4320 and 4330 do not contain either of these substances. However, in a salute to “green” chemistry, they incorporate renewable raw material, which has allowed them to earn the USDA Certified Biobased Product label as products that contain 50% USDA certified biobased content.*

Removing Paint from Metal and Concrete

EcoLine® 4320 and 4330 can be used on metal, cementitious, and masonry surfaces such as tanks, pipes, equipment, floors, and stairways. EcoLine® 4320 is a liquid version that can be applied via dip tank; EcoLine® 4330 is a gel that can be brushed or rolled onto coated surfaces. In most cases, EcoLine® 4320/4330 will soften the coating enough to remove it in 15-30 minutes, although this can vary depending on the number of layers and age of the coating. Corrosion inhibitors provide the added benefit of protection against flash rust on metals during the stripping process.

Get the Job Done with Biobased Alternatives

Regulations are tightening, but reality is also setting in about the serious health risks of methylene chloride. EcoLine® 4320 and 4330 are examples of chemistry advancements that eliminate these chemicals while helping industries get the job done and introducing raw materials from renewable resources. Contact Cortec® to learn more about these USDA Certified Biobased Product alternatives for paint removal.

Keywords: methylene chloride ban, EPA, NMP, paint strippers, industrial paint removers, USDA Certified Biobased Product, green chemistry, Cortec, alternatives to methylene chloride

*PPE and careful handling still required

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NEWS ALERT: Get Your Fleet Ready for Winter with These Undercarriage Coatings!

Winter brings snow and ice, prompting DOTs (departments of transportation) to get deicers out on the road to keep travel safe. As a result, plenty of deicing salts splash up on cars, trucks, and buses, leading to corrosion if not washed off quickly and thoroughly enough. Unfortunately, it is much harder, but not less important, to clean the vehicle underbody. Applying Cortec® underbody coatings before winter sets in is therefore a great corrosion prevention strategy for vehicle and fleet owners.

cortec underbody coatings

Anticorrosion Underbody Coatings

CorrBarrier™ Primer is a fast-drying water-based one-coat system suited for corrosion protection in the underbody/under-hood market. Although called a primer, it can serve as a standalone coating for protection of vehicle frames and undercarriages. It has a low VOC of 0.2 lbs/gal (24 g/L) and has a recommended DFT (dry film thickness) of 2.0-3.0 mils (50-75 µm). It is an ideal choice for those concerned about worker exposure to solvents and high VOCs. VpCI®-398 is a similar, yet heavier duty, solvent-based underbody coating. It can be applied more thickly at 4.0-5.0 mils (100-125 µm) DFT for stronger protection. Both coatings remain flexible with good chip resistance in case of gravel, salt, and other road particles hitting the coating.

Winterize Your Fleet Now

It can be difficult to plan ahead, but with winter fleet maintenance, the payoff can be huge. Coating undercarriages of cars, trucks, buses, and snowplows now will help them weather the winter better, resist corrosion, and ultimately last longer. Multiply the value of one truck’s extended service life by the scores or hundreds of vehicles in the fleet, and the ROI is significant. Contact Cortec® to learn more about coating your vehicle underbody to be ready for winter!

Keywords: fleet maintenance, vehicle rust prevention, stop rust on vehicle, deicing salt corrosion, snowplow maintenance, Cortec, winter driving season, undercarriage coatings, winterize your truck, corrosion prevention

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