April 28, 2010

Drinking Water Week, May 2-8

by Bob Murphy

Drinking Water Week, the annual celebration of the world’s most precious resource, begins Sunday, May 2. “Drinking Water Week is an opportunity for North Americans to think about what water means to each of us,” said AWWA President Craig Woolard. “A safe, reliable water supply is critical to the success of any community. It creates […]

March 31, 2010

In The News

by Bob Murphy

In reading various publications and articles I have chosen a few that may be of interest: LaFrance AWWA’s new executive director AWWA named David B. LaFrance as its new executive director. He will join the staff in May. LaFrance, 46, has served as director of finance for Denver Water for the past 12 years and […]

March 8, 2010

Running the Permeability Tests

by Bob Murphy

Running the Tests Wet Cup The majority of products tested n are done via D1653, Wet Cup method. The paints are drawn down at approximately 10 mil wet film thickness on release paper and allowed to dry overnight at 25ºC and 50% RH. A second approximately 10 mil wet film is drawn down over and perpendicular to […]

February 1, 2010

Terms of Confusion Part 2 Permeability Test Methods

by Bob Murphy

The Test Methods D1653 vs. E96 There are two primary ASTM test methods used to calculate the passage of water vapor through materials: ASTM D1653, Water Vapor Transmission of Organic Coating Films and ASTM E96, Water Vapor Transmission of Materials. Often times, you’ll see them referred as D1653-08 or E96-05. In ASTM convention, the number […]

January 20, 2010

Terms of confusion, Take 2

by Bob Murphy

Chemical resistance is one the most important qualities in protective linings in relation to protecting the infrastructure. Permeability is often overlooked aas a criteria for chemical resistance of protective linings “What’s the difference between transmission, permeance, and permeability?! I thought there were just ‘perms’.” Don’t worry – I’ll get to all of that later, but […]

January 7, 2010

Time has come today!

by Bob Murphy

As I travel across the country meeting with water utility operators I am often asked, How fast can I put your coating into immersion service?. For years the answer has been 5-7 days to allow the coating to cure properly before immersion into the wastewater system. The world today operates on a much faster time […]

December 23, 2009

Cor-Cote® HT Tank Lining and Hi-Temp Coatings

by Bob Murphy

Sherwin-Williams Protective & Marine Introduces Cor-Cote® HT Tank Lining and Hi-Temp Coatings Formulated For Use Under Thermal Insulation At Elevated Temperatures Sherwin-Williams Protective & Marine Division has introduced Cor-Cote® HT.  Ideal for tank linings and piping that lies beneath insulation at both ambient and high temperatures, this epoxy novalac amine is also designed for service […]

December 3, 2009

Flake Filled Coatings

by Bob Murphy

This is a reprint of a blog originally posted in June of 2009 A favorite quote for me comes from “Corrosion Prevention by Protective Coatings”, written by Charles Munger.  Protective coatings “are the skin, over the skeleton, that both protects and beautifies the bone and muscle of the world’s essential structures”.  That is a good […]

November 20, 2009

Muscling Out Mussels In The Water Process Industry

by Bob Murphy

In an earlier blog titled, We Are Being Invaded! – Mussels Muscling In On Our Water Process Structures, we discussed the impact and consequences of bio-fouling by indigenous and invasive mussels and barnacles on water processing equipment and structures.  In this blog, let’s talk about options to stop or eliminate fouling by these “critters”. At […]

November 17, 2009

Terms of Confusion

by Bob Murphy

Many times coating projects can be held up due to confusion in defining terms that are used during the process coating of concrete. This is an attempt to clear up some of the potential confusion. Acid etching: application of acid (typically muriatic acid) to clean or alter the concrete surface. Best used when there is […]