JPCL February 2006

 
JPCL February 2006

In This Issue...


Applicator Training Bulletin: Tools and Methods of Hand Tool Cleaning

by Craig Henry and Burke Bennett

Hand tool cleaning is one of the oldest methods of preparing steel surfaces. It is widely used for preparing small areas and for areas that cannot be blast cleaned. A hand tool-cleaned surface is one that is free of loose rust, loose paint, and loose mill scale. Tight rust, tight mill scale, and tight paint are allowed to remain on the surface. Before you start hand tool cleaning, remove dirt and grease from the surface by solvent or detergent cleaning. A hand tool-cleaned surface is achieved with wire brushes, sanders, chipping hammers, and other hand tools listed below.


Aspects of Salt Concentration on Prepared Steel Substrates

by Andreas Momber

Surface contamination by dissolved salts has always been an issue for the corrosion protection industry. It was, however, the replacement of lead-bearing paints (Pb3O4) by other paint types due to environmental concerns that caused the industry to take a closer look at salts with respect to coating performance. A unique property of lead compounds is the capability of binding up soluble salts. Other coating compounds do not have this capability, and it was for that reason that salt contamination became an issue in surface preparation and coating.


Associations: PDA Show Is Going to California

by Technology Publishing Company

Many industrial and marine coatings-related sessions will be held at the seventh annual conference of the Polyurea Development Association PDA), to be held March 19–21 in Los Angeles, CA. “Polyurea — Innovations at Work” is the theme for this year’s event, which includes educational and networking opportunities and an exhibit that features polyurea products, services, and technologies. According to the association, differences between this year’s show and previous ones include more general session speakers and the elimination of breakout sessions.


Case History: Shell’s Pump Station Docks Protected by Antistatic Polyurea

by Technology Publishing Company

When Shell Deutschland GmbH in Hamburg, Germany, required a coating system to protect concrete landing/discharging docks for ships transporting petrochemicals and other flammable materials, a coatings manufacturer developed a cost-effective antistatic polyurea offering chemical resistance, durability, easy application, and a variety of colors. Handling over five million tones of petrochemical products, the refinery has several pump stations where ships carrying crude oil, fuel, diesel, and heavy oils are loaded and unloaded. The f loor of these areas is regularly exposed to spills and leaks. Epoxy coating systems previously used by Shell had been too rigid and brittle, developing cracks due to weathering.


Coating Transmission Pipeline for Arctic Conditions: Trial Shows Promise

by P. Singh, S. Haberer, N. Gritis, R. Worthingham and M. Cetiner

This article describes how a new shop-applied, high-performance composite coating for natural gas pipelines is withstanding harsh Arctic environments and proving to be an economical solution for pipeline construction.


Companies: Enviroline Announces New Hires

by Technology Publishing Company

Enviroline Group (Ft. Lauderdale, FL), a manufacturer of high-performance coatings, has hired Boyd C. Deiley as area sales manager and Lourdes Matos as customer service specialist.


Editorial: We Were Lucky

by Bill Shoup

I was sitting at home on the evening of December 27th, watching the local news, when suddenly there was a breaking news story about a bridge collapse on Interstate 70 approximately 30 miles south of Pittsburgh. There were initial reports that the entire structure had collapsed onto the interstate and multiple vehicles had slammed into the fallen bridge. It was also reported that other vehicles were trapped under the fallen structure. As it turned out, these initial reports were false, and only two vehicles were involved, with a total of five injuries. Thankfully, no one was seriously injured. It could have been far worse on that busy interstate. The collapsed structure turned out to be one 60-ton, 53-foot, box beam of a 45-year old concrete bridge. The suspected cause of the beam failure, corrosion of the rebar and steel cables, had not been detected during inspection. The structure had also been weakened by numerous tractor-trailer strikes. The corrosion was accelerated by the use of road salt and the water that drained over the fascia of the beam.


Equipment Maintenance: The Dos and Don’ts of Spray Gun Maintenance

by Technology Publishing Company

A spray gun, whether it is conventional, air, airless, air-assisted airless, or HVLP, requires proper maintenance to consistently produce quality results and provide years of satisfactory use. A spray gun’s efficient operation depends on your knowledge of its construction, operation, and maintenance. This article will discuss things that you should and shouldn’t do when it comes to maintaining a spray gun.


Factors Influencing Early Crack Development in Marine Cargo and Ballast Tank Coatings

by Dr. George Mills and Johnny Eliasson

In the past decade or so, a number of ships have suffered early failure of protective coatings in the form of cracking in the corners of water ballast tanks (WBT). This type of failure poses a risk to the structural integrity of the ship. Premature cracking of coatings has been observed in structures for offshore and other industries, but in ships, the consequences have become more obvious and costly in many ways besides the expense of repairs. This has led to lost revenue, due to inspection finding the condition of the coating in the WBT poor, requiring repair before the vessel can sail again.


Foul-Release Coatings: Past, Present, and Future

by Raouf Kattan

Keeping ship hulls free from fouling has traditionally required a biocidal effect produced by any of a number of mechanisms, such as copper compounds alone; copper compounds in combination with a booster biocide of some form; and tributyl tin (TBT) compounds with booster biocides.


Innovative Product: New Intumescent Polyurea Lining Offers Fire-Resistant Secondary Containment

by Technology Publishing Company

It’s said that necessity is the mother of invention. In Tony LaGrange’s case, necessity resulted from a fire at an oilfield compressor station, which destroyed the structure and its secondary containment lining. In early 2005, LaGrange’s Quantum Technical Services Ltd. began developing System 550D-FR, an intumescent polyurea that offers fire protection in addition to chemical resistance. Polyureas are commonly used as secondary containment liners because of their seamless application and rapid cure.


News for the Marine Industry: Industry Supports New ABS Middle East Technical Committee

by Technology Publishing Company

According to the American Bureau of Shipping (ABS), 37 senior technical representatives from the Middle East shipping, oil and gas, and offshore support sectors attended the inaugural meeting of the newly formed ABS Middle East Technical Committee held in Dubai. Members of the committee represented ship owners, shipyards, ship managers, and flag administrations. They gathered to discuss and review a wide range of technical developments affecting their activities, ranging from details of the new IACS Common Structural Rules to issues affecting the design and operation of offshore support vessels.


News for the Marine Industry: PCE Marine Coatings Conference Moves to Hamburg

by Technology Publishing Company

This year the PCE Marine Coatings Conference will be held in conjunction with the SMM (Shipbuilding, Machinery and Marine) Technology exhibition in Hamburg, Germany. The conference, co-organised by Mühlhan Surface Protection International, GmbH, Hamburg, will take place within the exhibition showgrounds on September 27-28. An opening plenary session on the state of the art of marine coatings will be followed by three technical sessions. An abbreviated schedule is shown below.


Problem Solving Forum: What You Should Know When Specifying Polyurea

by Identified within article

From a specifier’s point of view, what are the important distinctions between various products that are classified as “polyurea”?


Products: New Line of Slip-Resistant Coatings

by Technology Publishing Company

International Paint LLC (Houston, TX), an Akzo Nobel company, has introduced Intershield slip-resistant systems, a line of coatings designed to protect walking surfaces and provide resistance against slipping on the surfaces when they are wet. Non-slip surfaces are especially important for workers involved in steel erection.


Project Preview: Certified Coatings Awarded Utah Bridge and Dam Deck Painting

by Brian Churray

Certified Coatings (Concord, CA) was awarded a contract of $2,995,588 to clean and recoat steel and concrete surfaces on the Cart Creek Arch Bridge and the deck of the Flaming Gorge Dam. The project includes abrasive blast cleaning and recoating a total of 87,817 square feet of existing steel surfaces, including 75,624 square feet of bridge structural steel, 9,080 square feet of bridge railing, and 3,113 square feet of dam deck structural steel.


SSPC News: Guide to SSPC-VIS 1 Now Available in Spanish

by Technology Publishing Company

SSPC has published a new Spanish guide to SSPC-VIS 1, Guide and Reference


Top of the News: OSHA Revokes Slip Resistance Rule

by Technology Publishing Company

The January 18 Federal Register reports that OSHA has revoked a provision within the Steel Erection Standard concerning slip resistance of skeletal structural steel. The agency made this decision after reviewing SSPC’s comments suggesting that there has been no significant progress regarding the suitability of the test methods referenced in the provision or the availability of coatings that would meet the slip resistant requirements of the provision. OSHA further agreed with SSPC that there is a high probability that the test methods will not be validated through statements of precision and bias by the effective date (July 2006) and that ASTM is likely to withdraw them shortly thereafter. Since employers will be unable to comply with the provision, the Agency has decided to revoke it.


True Value of Quality: A Case History of a Success Story

by Benjamin S. Fultz

A very large crude carrier was converted to a floating crude oil storage tank. The high-build, glass flak-filled polyester coating system specified for the underwater hull began to fail before the conversion was complete. This article discusses some of the quality issues associated with both the initial coating application and the subsequent recoating.


   
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