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Dr. Galv KnowledgeBase



Tuesday, October 6th

Impact of Cooling Methods on Coating Appearance and Structure (11:00 ET) 

Eric Michaud - Corbec, Inc.

This presentation summarizes the results of a study conducted to investigate the effect of air cooling on the appearance and structure of the zinc coating to address concerns with flaking coatings on thick steels. Microscope images of the galvanized coating were evaluated upon varying galvanizing times and cooling method where a noticeable difference in the coating structure was observed.

It's a Dirty World - Methods for Cleaning Steel Continues to Evolve (11:30 ET) 

Bob Woods - Zaclon, LLC

Methods for cleaning surfaces, such as steel or iron, continue to evolve.  This presentation reviews what options are out there, what galvanizers have been doing, and if any of the newer approaches look promising for hot-dippers’ need for effective, efficient, and cost-competitive processes, while improving safety and environmental impacts.

Thursday, October 8th

Passivation for HDG Free from Hexavalent Chromium Application by Dipping (11:00 ET)

Joe Allen and Khalil Hammade - TecCoat Metal Treatments

This presentation will clear up some misconceptions regarding the performance of non-hexavalent chromium passivation coatings and their overall performance. In addition, information will be provided on environmentally-friendly alternative technologies to chrome 6 passivation, methods to reduce concerns over wet storage stain, and technologies which meet RoHS requirements.

New Resources to Assist with HDG Process Calculations: Progressive Dip and Iron Maintenance Using the Kleingarn Curve (11:30 ET)

Alana Fossa - AGA

The AGA recently launched two new resources to assist galvanizers with detailed calculations which may be performed at the galvanizing plant.

The AGA Progressive Dip Charts and the AGA Progressive Dip Calculator tools can be used to confirm whether an article of a particular size can be progressively dipped successfully. This presentation includes information on using the charts/tools to help you make educated decisions on maximum part lengths, article orientation, and minimum/maximum lifting angles for successful galvanizing.

The Kleingarn Curve is the isotherm solubility curve between hydrochloric acid concentration and iron concentration in solution at 20C (68F) depicting lines for optimum iron concentration for each hydrochloric acid concentration and saturation concentrations where pickling is no longer possible. The AGA Iron Maintenance Calculator helps galvanizers manage iron concentrations by calculating water and/or acid additions required to bring iron levels within optimal levels for hydrochloric acid pickling according to the Kleingarn Curve.

Tuesday, October 13th

Factors Influencing Dip Times and Coating Thickness (11:00 ET)

Alana Fossa - AGA

The hot-dip galvanizing of reactive steels or thick steels (beyond 2-3 inches thick) presents process challenges to galvanizers such as a high zinc consumption rate and/or extra processing time.  This presentation, adapted from the AGA Process Seminar series, will review the combined impact of the “cocoon” effect, steel thickness, steel chemistry, kettle temperature, venting/draining and more on overall immersion times while providing methods to minimize zinc consumption.

The Galvanizing Kettle: Temperature Set Point and Overall Longevity (11:30 ET)

Dr. Thomas Langill - AGA

The operation and heating of the galvanizing kettle directly relates to overall kettle longevity. This presentation, adapted from the AGA Process Seminar series, will explain the relationship between the kettle and the furnace, including how to avoid uneven heating, hot spots, and overheating.

Thursday, October 15th

Inspection Lot Sizes and Multi-Specimen Test Articles for HDG Inspection (11:00 ET) 

Alana Fossa - AGA

A sampling protocol has been adopted by ASTM to ensure high quality products because the inspection of the hot-dip galvanized coating thickness for every piece of material galvanized in a project would not be practical. Adapted from the AGA Inspection Seminar, this presentation will review how to determine the correct number of test articles based on identification of a “lot” as defined in ASTM A123. Afterward, real-world examples of coating thickness inspection for single specimen vs. multi-specimen test articles will be provided to demonstrate proper coating inspection procedure:

  • Single-Specimen Articles
  • Multi-Specimen Articles of Single Material Category and Thickness (Surface Area >160 in2)
  • Multi-Specimen Articles of Multiple Material Categories or Thickness (Surface Area <160 in2)
  • Multi-Specimen Articles of Multiple Material Categories or Thickness (Surface Areas > 160 in2)
  • Pole structures and Pipe trusses

HDG Repair: Updates to ASTM A123 and Ensuring Conformance to ASTM A780 (11:30 ET) 

Dr. Thomas Langill - AGA

In order to ensure strict adherence to the specification ASTM A780 when performing repairs at the galvanizing plant, the galvanizer should be well versed in the equipment, materials and surface preparation standards required of each repair method. Although some of the requirements within ASTM A780 are relatively straightforward, other requirements related to surface preparation often require clarification. This presentation, adapted from the AGA Inspection Seminar, will review requirements that are often topics of confusion or ambiguity during touch-up and repair at the galvanizing plant as well as recent updates to ASTM A123 related to maximum repair size at the plant and in the field.

Tuesday, October 20th

Transformative Studies in the Batch Galvanizing Industry (11:00 ET)

Bernardo Duran - IZA

This presentation will review select studies that have had far-ranging impacts on the specification and processing of batch hot-dip galvanizing. Sample topics include cope cracking, and chemical composition and mechanical properties of steel selection. The goal is to provide galvanizing technical and sales personnel with information to improve their customers’ experience with specifying galvanizing. A Dropbox link will be provided for members to download the full papers.

Lessons Learned from Mysterious Rough Coatings on Flat Bar and Round/Square Stock (11:30 ET)

Seattle Galvanizing

In 2019, members of the AGA in the Pacific Northwest region collectively experienced a surface condition identified as laps in steel surfaces which presented themselves as sharp, raised spikes after hot-dip galvanizing. This surface condition was very difficult to identify prior to galvanizing, and mechanical cleaning before galvanizing was not successful at remedying the steel surface. This presentation will share one galvanizer’s experience of the issue, steps taken to investigate the cause, identifying problematic material, and methods developed to manage the customer’s expectations.

Thursday, October 22nd

State-of-the-Science Tools Support Better Stormwater Benchmarks for Zinc (11:00 ET)

Eric Van Genderen & Adam Ryan- IZA 

International Zinc Association has partnered with AGA members over the last few years to apply the latest tools for assessing stormwater permit limits for galvanizers. Results have demonstrated improved benchmark levels for all sites, and realized a fivefold increase in benchmark value for one galvanizer. By properly characterizing zinc bioavailability in the receiving environment, stormwater benchmarks can be developed that are both scientifically and technologically defensible.

Environmentally Friendly Rust Preventative Coating and Passivation Alternative (11:30 ET)

Tuesday, October 27th

Effective Ways to Communicate in a Virtual World (11:00 ET)

Melissa Lindsley - AGA

For all the puns about the year 2020 and perfect vision, I doubt any of us expected what this year has brought with the COVID pandemic.  Although I can't tell you when or what the next major disruption will be, there is always a need for efficient communication whether in person or from a distance. This presentation will provide tips on how to stay connected now and in the future.

Accessing Members-Only Content in the AGA Website (11:30 ET)

Jeff Cunningham - AGA

This presentation will walk through signing up for a member login and accessing the member section of the website. 

Utilizing Technical and Marketing Resources on the AGA Website (11:40 ET)

Melissa Lindsley - AGA

The AGA has developed a number of tools and resources to help members address common specifier and fabricator questions. All of these tools are available on the AGA's website, but some are "hidden" in the Members Only section. Are you utilizing these tools effectively? This session will feature some of the latest and greatest tools and how to access them from the site. 

Thursday, October 29th

How to Develop a Simple Local SEO Strategy for your Website (11:00 ET)

John Krzywicki - AGA

Developing a strategy to generate website traffic locally is essential for businesses with physical locations. It gives you an opportunity to outrank authority websites for important keywords within your city/state/region. You'll learn how to easily build/optimize a Google My Business profile, get listed in Google/Apple Maps, and develop a strategy for gathering/managing reviews. This presentation is geared towards individuals with little to no digital marketing experience and a "Local SEO Worksheet" will be provided to assist with easily setting this up for your company.

How to Use AGA's HDG Performance Charts & Data: HDG in the Air, Soil and Water (11:30 ET)

Alana Fossa - AGA

Hot-dip galvanized steel is specified in many different applications and environments. Exposure conditions include atmospheric, soil, and water environments. Although the galvanized coating provides barrier and cathodic protection in each of these applications, the mechanism of corrosion protection can be different. This presentation will review how to predict HDG performance and evaluate approximate zinc corrosion rates using the AGA’s Time to First Maintenance Charts, Performance of HDG in Soil Charts, and HDG Performance in Water Guide