Waterblog

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 [...]

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 [...]

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 [...]

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 [...]

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 [...]

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 [...]

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 [...]

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 [...]

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 [...]

Sustainability has become a topic of increasing discussion within the drinking water industry. It is referenced as part of the every day operation of water utilities; however, there is still some confusion about what being a sustainable utility actually means. Water utilities, their customers, regulatory agencies and Congress are asking what the drinking water industry [...]