Follow us on Twitter Follow us on LinkedIn Like us on Facebook Follow us on Instagram Visit the TPC Store
Search the site




Problem Solving Forum

| More

February 21 - February 27, 2016

Alternatives to coal tar epoxies in wastewater/sewage applications have been in service for a number of years. From experience, which coating types with what fillers at what thicknesses (over steel) have performed best?

More items for Coating Materials

Selected Answers

From Todd Theis of Gulf Coast Paint Mfg., Inc. on November 7, 2016:
I would recommend a cycloaliphatic epoxy, applied in 3 coats at 7-10 mils DFT per coat.

From Anthony Koontz of Sherwin Williams on October 20, 2016:
I suggest a solvent-free elastomeric polyurethane at 60-80 mils dry film thickness.

From Tom Schwerdt of Texas Department of Transportation on May 12, 2016:
Why would you switch from coal tar epoxy to coal tar urethane? Coal tar is unpleasant to work with and a carcinogen.

From Robert Olmstead of Olmstead Business Services International (OBSI), LLC. on May 6, 2016:
I am aware of many waste treatment/sewage plants going back to 1989, both domestically and internationally, that have successfully specified and maintained ongoing use of 2 coats of coal tar urethane (CTU) at 10-12 mills DFT per coat, on concrete clarifiers and similar structures. The coating is based on a single-component, moisture-cure urethane (MCU). On steel they use same spec over a MCU zinc or MIO Zinc (micaceous iron oxide) combination primer, at 2-4 miles DFT. They also use the same zinc primer under a MIO-rich intermediate (3-5 miles DFT) with an aliphatic MIO-rich MCU topcoat (2-4 miles DFT) for areas above the water/sludge line for severe chemical and abrasion resistance. The  material is conventionally applied. It must be high solids (>62% solds by volume) and VOC-compliant in all 50 states. These systems are well established and readily available in the marketplace.

From bart de cremer of acotec on April 25, 2016:
i suggest a solvent-free epoxy with a DFT of 1000 microns, a proven one-layer coating system to be applied by brush and airless spray with single- or plural-pump type Graco or Wiwa.

From Feng Min of Andritz Hydro on April 22, 2016:
I suggest a vinyl ester resin with glass flake filler at 300-1500um.

Please sign in to submit your answer this question    

Tagged categories: Coal tar epoxy; Coating types; Sewer systems; Steel; Wastewater Plants

Current PSF Question | Submit a PSF Question | Full PSF Archive

Mitsubishi Gas Chemical America
Performance Amine 1,3-BAC
A highly reactive cycloaliphatic diamine offering superior performance. Reasonable cost and curing efficacy makes it suitable for all types of epoxy resin applications.

New resins from BASF will have metals loving water!
Excellent corrosion resistance, low VOC, high gloss, thin films 800-231-7868

Industrial Vacuum Equipment Corp.
Hurricane Vacuums
& Dust Collectors
Vacuum and dust collector hose, filters and related accessories.

SABRE Autonomous Solutions
Personnel are free to do other tasks while the ALPHA1 does the “dirty work”.

HoldTight Solutions Inc.
Our HoldTight®102 salt remover & flash rust
preventer prevents flash
rust by removing surface contaminants. Contact us
for your nearest distributor.
(800) 319.8802

Tarps manufacturing, Inc.
QUALITY MADE IN AMERICA —Available near you!
CLICK to get a behind-the-scenes look at how Tarps Manufacturing makes the highest-quality tarps right here in the USA — available nationwide.

Jotun Paints Inc.
Jotun Jotachar 1709
Mesh-free passive fire protection epoxy designed to protect against hydrocarbon pool fire scenarios for up to four hours as defined in the ANSI/UL1709 standard.

Carboline Company
New product: Carbozinc® 608 HB
Introducing a new high build zinc-rich primer that can save you time and money by eliminating the epoxy intermediate coat!

Sauereisen, Inc.
SewerGard® 210XHB
• 300 mils in a single coat by plural component equipment
• Fast Setting
• 100% Solids Epoxy
• Chemical-resistant barrier for municipal wastewater environments

Absolute Equipment/Grand Rental Station
We have Tier 4 Equipment including Air Compressors & Generators for Sale & Rent! Your job may now require Tier-4. or Call 412-931-6655.


Technology Publishing Co., 1501 Reedsdale Street, Suite 2008, Pittsburgh, PA 15233

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL

The Technology Publishing Network

Durability + Design PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker

EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About   |   Privacy Policy   |   Terms & Conditions   |   Support   |   Site Map   |   Search   |   Contact Us