June 28, 2010

Coatings for AWWA D-100 Welded Steel Tanks

by Bob Murphy

This past Thursday Tony Ippoliti presented the second in a series of Webinars dedicated to the Water Industry. Tony’s presentation covered the D-102 Standard  of AWWA and the products that Sherwin-Williams can offer to meet or exceed these requirements for potable water storage.

Pre-Construction Primer

In Tony’s presentation was highlighted the use of a shop-applied pre-construction primer on steel plate. Most of these primers are formulated and tested for compatibility with the weld processes so that they may be applied edge to edge without weld margins . Pre-construction primers used on interior surfaces shall have been tested and certified for potable water contact in accordance with NSF / ANSI 61, Drinking Water System Components-Health Effects, by an ANSI-accredited laboratory.

Click on the Webinar topic on the right for more information and to register for upcoming sessions.

June 21, 2010

New Webinar Registration Link

by Bob Murphy

We have automated the Sherwin-Williams Webinar series sign-up process.
Just click on the title of the Webinar that you plan to attend and you will be automatically registered for that specific presentation.

This is a great way to learn about topics related to Water and Wastewater Industry. It can be done during your lunch time at your desk or conference room.
Coming soon will be a way to obtain the presentation for future review.

Keep tuning in!!!

June 13, 2010

Show Me The Water

by Bob Murphy

Please join me and thousands of your fellow water professionals at AWWA’s Annual Conference and Exposition, June 20–24, 2010, in the bustling city
of Chicago.

Come visit us at Booth 1537. Learn how Sherwin-Williams can protect your facility or structure from Start to Finish. You will see our complete line ANSI/NSF 61 approved coatings with OAP Technology as well as our products that provide outstanding long term exterior service.

This year’s conference will explore the issues of water resource
sustainability, system sustainability, workforce sustainability and economic

I will be moderating a session on Monday June 22 from 2:00-5:00 PM on Sustainable Energy Management.

Topics will include:

1. 2:00 PM
Decision Support System for Sustainable Energy Management

(PA) Terrance Brueck, EMA, Inc.;
Steve Conrad;
Jack Geisenholf;

2. 2:30 PM
Resource Efficiency Management, A New “Green” Trend during Economic Crisis

(PA) Robyn McGuckin, MWH Corporate Headquarters;

3. 3:00 PM
Improve Your Sustainability by Minimizing Your Energy/Carbon Footprint

(PA) Harold Reed, American Water;

4. 3:30 PM
How to finance sustainable energy management solutions

(PA) Lee Ferrell, Schneider Electric;

5. 4:00 PM
NBMA’s Green Environmentally Friendly WTP

(PA) Stephen Kerbacher, Northampton Borough Municipal Auth;
R. Hughes;
Laurence Zimmermann

Come join in the World’s Water Event!

June 8, 2010

Water/Wastewater Webinar Series

by Bob Murphy

On June 3rd, the Water/Wastewater Team of the Sherwin-Williams Company launched a series of Webinars dealing with a variety of topics related to the industry.

The inaugural Webinar was lead by Bruce Snyder, Business Development Manager. Over 50 individuals logged in to participate in the Webinar titled Infrastructure Linings and Rehabilitation. His talk covered corrosion mechanisms, water inflow and infiltration as well as structural repairs. It was a great kick off to our Series.

Upcoming topics are:

06/24/10          Coatings for AWWA D-100 Welded Steel Tanks – Tony Ippoliti

This presentation will cover AWWA D-102 standards and the products that Sherwin-Williams can offer to meet or exceed these requirements for potable water storage.

*07/13/10        Selecting the proper coating/lining system – Kevin Morris (12-1 PM Eastern Time)

This presentation will cover the things that should be considered when selecting a coating or lining for use in secondary and primary containment within a water & wastewater environment. We will also discuss Sherwin-Williams product offerings as they relate to common chemicals within this market.

Application of chemical resistant coatings/linings – Kevin Morris (12-1 PM Pacific Time)

This presentation will cover proper application methods with a focus on the details necessary for proper long-term performance (Terminations, penetrations, transitions, etc.)

*07/15/10        Application of chemical resistant coatings/linings – Kevin Morris (12-1 PM Eastern Time)

This presentation will cover proper application methods with a focus on the details necessary for proper long-term performance (Terminations, penetrations, transitions, etc.)

Selecting the proper coating/lining system – Kevin Morris (12-1 PM Pacific Time)

This presentation will cover the things that should be considered when selecting a coating or lining for use in secondary and primary containment within a water & wastewater environment. We will also discuss Sherwin-Williams product offerings as they relate to common chemicals within this market.

08/05/10          Coatings for AWWA D-110 & D115 Concrete Tanks – Tony Ippoliti

This presentation will take a look at the various acceptable coatings for use on concrete tanks, both interior and exterior. We will discuss Sherwin-Williams product offerings and the features and benefits obtained with these coating systems.

09/02/10          Putting new technology to work for you – Bob Murphy

This presentation will discuss new technologies that Sherwin-Williams has to offer to the market and how these new products effect asset protection, VOC regulations, and service life.

09/23/10          Elastomeric Coatings in Aggressive Environments – Bruce Snyder

This presentation will discuss the features and benefits of Polyureas versus Polyurethanes, the environments in which these coatings will perform and environments which should require other product selections.

10/14/10          Color & Gloss Retention, What does it mean? – Kevin Morris

This presentation will cover the many methods of testing for color and gloss retention and the variations within the test methods, as well as how color and gloss pertain to long term performance.

11/04/10          Role of Protective Coatings in Asset Protection – Bob Murphy

This presentation will cover the basics of corrosion and the protection mechanisms provided by different generic types of coatings. Expected life cycle will be discussed utilize industry documents such as NACE and SSPC.

All topics will be offered at 12-1 PM Eastern Time and 12-1 PM Pacific Time on the day that they are scheduled!


* – Notes that there are 2 different presentations being offered on these days at different times.

April 30, 2010

In the News – NSF and GEI Announcement

by Bob Murphy


— The GREENGUARD Environmental Institute (GEI) and NSF International announced today the joint development of a health-based standard that addresses chemical emissions from products.

This comprehensive standard will streamline the myriad methods currently used for measuring and limiting chemical emissions from products, and will incorporate the most recent science on human health and toxicology to provide acute and chronic chemical exposure limits.

The GEI-NSF standard will be developed under the American National Standard Institute’s (ANSI) Essential Requirements for adoption as an ANSI Standard. The ANSI Standard development process ensures that the standard is developed in a balanced, open, and collaborative manner with participation by multiple stakeholders to avoid potential conflicts of interest.  A consensus committee made up of government and public health officials, academics, industry leaders, and product users helps develop and vote on the standard, while a group of subject matter experts provides insight and guidance.  Subsequent mandatory public comment periods allow individual stakeholders and organizations to participate in the development process, too.

PRNewswire-USNewswire/April 28,2010

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 jobs, supports business and investment, and provides for the health and welfare of citizens in ways ranging from disease prevention to fire suppression.”

Most Americans do not realize how exceptional it is to have a source of clean drinking water at the turn of a tap. It is still  estimated that over 1.1 billion people rely on unsafe drinking-water sources.

For more information contact:

American Water Works Association

Water Environment Federation

Water for People

World Health Organization

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


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 is a respected industry leader in the areas of utility economics and water rates.

“It’s a privilege to lead AWWA at such an important moment in the history of our association,” LaFrance said. “I look forward to working with AWWA volunteer leaders and staff in fulfilling our mission to protect public health and to provide safe and sufficient water for all.“

US utilities get $6 billion from

Recovery Act

Of the $6 billion allocated for drinking water and clean water state revolving funds (SRFs) by the American Reinvestment and Recovery Act, 100 percent was committed to signed contracts in time for the Feb. 17 deadline.

“Not one dime had to be reallocated,” Lisa Jackson, US Environmental Protection Agency chief, told Congress in late February. Sen. Ben Cardin, D-Md., responded, “If we had more money, the need is there.”

The Drinking Water SRF, which received an extra $2 billion appropriation from ARRA, has 1,348 project agreements signed with contracts executed. Construction has begun on more than 80 percent of those projects — 1,097 projects, valued at $1.5 billion.

The drinking water projects exceeded the requirement that 20 percent of the projects be “green.” The final tally showed 513 drinking water projects (valued at $539.1 million) met the green requirements — 28.8 percent.

US Waives “Buy American”

Requirements for Canada

Canada and the Unites States have signed an agreement to provide equal access to their government procurement programs, seeking to end a dispute over “Buy American” provisions in the U.S.stimulus package.

The deal gives companies on both sides of the border access to government procurement contracts below the federal level.

Under the agreement, which went into effect Feb. 16, the countries agreed to permanently give reciprocal treatment in the Canadian territories and provinces and 37 U.S. states covered by the WTO’s procurement agreement.

March 10, 2010

Summing up the “perm” Series

by Bob Murphy

Final Odds ‘n’ Ends

There are four things you should always ask yourself when evaluating competitors’ data or even comparing one set of data to another:

  1. What test method was used? ASTM D1653? E96? Some other method? Dry cup or wet cup?
  2. Are the terms the same? Am I comparing WVT to WVT or WVT to WVP?
  3. Are the units the same? Is it WVP in English units or metric units?
  4. What were the test conditions?
    • For WVT, the temperature, humidity and dry film thickness are needed to replicate the results
    • For WVP, the dry film thickness is needed

Also, a little knowledge of the calculations used to generate the data can be extremely useful. Another useful bit of information is the conversion factor from one term to another:

Covert from Metric* to English units: Multiply by 1.434
Convert from English to Metric* units: Multiply by 0.697
*Assuming the metric units are per hour, not per day

Covert from Metric* to English units: Multiply by 36.4
Convert from English to Metric* units: Multiply by 0.027
*Assuming the metric units are per hour, not per day

Covert from Metric* to English units: Multiply by 75.0
Convert from English to Metric* units: Multiply by 0.013
*Assuming the metric units are per hour, not per day

If you want to “convert” from WVP to WVT or Permeability to WVT, you’ll have to make some assumptions regarding the test conditions and/or dry film thickness or you’ll have to know these variables.

In order to convert from WVT to WVP or vice versa, you need to know the test temperature and relative humidity.

At 25ºC and 50% RH:
Metric Units: WVP is approximately 1/12th WVT
English Units: WVP is approximately 2 times WVT
At 25ºC and 50% RH with a 6 mil dry film:
Metric Units: Permeability is approximately 1/3rd WVP and 1/36th WVT
English Units: Permeability is WVP times the dry film thickness and approximately 2 times the dry film thickness larger than WVT

Water vapor transmission is a fairly common product specification and a fairly simple, but time consuming, test to run. However, the number of ways to report the data as well as the allowable variability in the test methods makes interpreting data from an outside source (competitors’ product specification, outside lab, etc) difficult, at best. Keeping this in mind, some knowledge of how the test is run, how the calculations are performed, and what data is presented goes a long way in helping to demystify this subject.

Many thanks to Jason Godlaski

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 the first. This 2-layer system is then allowed to dry for an additional week at 25ºC and 50% RH. Layering the paint tends to minimize the number of pinholes or other defects that can artificially raise the water vapor permeability. It also creates a film that is sufficiently thick to handle as a free film, about 5-7 mils dry film thickness. Once dry, the films are examined to locate areas with the least number (preferably zero) defects. The quality of the film can have a large bearing on the final results. A film covered in pinholes or other defects is going to produce an erroneously high perm rating. Pieces large enough to cover the mouth of a 2 ounce glass jar are then cut out of the film. The jars are filled with water and the films are glued to the mouth of the jar using a permanent glue stick. Three samples are prepared for each paint to be tested.

The permeability samples are then placed in the environmental chamber and allowed to equilibriate for at least 24 hours prior to the initial weighing. The whole apparatus is then weighed twice a day for 3 to 4 days. Once weighing is completed, the film is removed from the mouth of the jar and the thickness of the dry film directly above the mouth of the jar is measured with a digital micrometer. The adhesive used to affix the film to the jar produces an regular area, so cross sectional area of the mouth of each jar is used as area of permeance.

Dry Cup

Samples for the dry cup method are typically spray applied over drywall and are tested as received (usually spray applied at 4-6 mils thick and allowed to dry for one week). The drywall is cut to fit over the lip in a Rubbermaid Ice Storage tray. The tray is filled with approximately 1 lb of indicating desiccant (Drierite) and the coating drywall is placed in the tray and sealed in place with caulk. Testing has shown that the caulk used to seal the perm cups is impermeable to water. Two to three test cups for each paint tested are typically prepared. The test cups are then placed in the environmental chamber at 25ºC and 50% RH for a day to equilibrate and allow the caulk to dry/cure. The test cups are then weighed daily for at least 4 days. Generally, the desiccant saturates with water fairly quickly so extended testing times are not possible. The area of permeance is calculated by taking the average of 5 measurements in both the width and length of exposed sample between the caulk. Multiplying the average width by the average length produces the area. Since the coating is applied to a substrate, it is difficult, if not impossible, to measure the dry film thickness.

Next up: Calculations and results

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 following the test method number is the revision year.

So what’s the difference between the two test methods? In all honesty, there are too many to list here, but the main difference lies in what materials are typically “covered” by each method. D1653 states that “these test methods cover the determination of the rate at which water vapor passes through films of paint, varnish, lacquer, and other organic coatings. The films may be free films or they may be applied to porous substrates”. E96 states “these test methods cover the determination of water vapor transmission (WVT) of materials through which the passage of water vapor may be of importance, such as paper, plastic films, other sheet materials, fiberboards, gypsum and plaster products, wood products, and plastics.” In our lab, D1653 is used for free paint films and E96 is used for thicker materials or coated materials, eg: paint on drywall. However, there is nothing stated directly in E96 that it can’t also be used for free films. That’s the beauty of ASTM methods: specific in some regards, vague in others.

Dry Perms vs Wet Perms

It gets even better – both D1653 and E96 cover both the “Dry Cup” and the “Wet Cup” method. We tend to refer to these methods as “dry perms” and “wet perms”, respectively. The primary difference between dry cup and wet cup methods is in direction of water vapor “flow”. In the dry cup method, the sample is adhered to a test dish containing a suitable desiccant and the whole apparatus is placed in a controlled temperature and humidity chamber. Water vapor therefore “flows” from the chamber side of the test specimen (high humidity) and into the desiccant (low humidity). In the wet cup method, the sample is adhered to a test dish containing water, so that water vapor “flows” from the water side (high humidity) through the test specimen and out into the chamber (low humidity).

ASTM states that the dry cup method should be used when the test material in question is not expected to experience any high relative humidities. Conversely, the wet cup method is used when high relative humidities in the vicinity of the test specimen are expected. In general, a coating will have a higher water vapor transmission rate by the wet cup method than by the dry cup method. This is caused by the fact that most coatings that allow water to permeate will absorb more water at high humidities and therefore allow for a easier passage of water vapor through the coating. Therefore, it cannot be expected to directly compare results obtained by the dry cup method to those obtained by the wet cup method.