The Saint Lawrence Seaway is a series of locks, canals and navigable channels that allow oceangoing vessels to travel from the Great Lakes to the Atlantic Ocean. To facilitate this transport, construction on the St. Lawrence Seaway along the St. Lawrence River began in 1954 and was completed in 1959. The existing gates were installed
A Corrosion Control Plan for Saint Lawrence Seaway Navigation Locks Read More »
Introduction – A number of different coating systems can be applied to galvanizing for both beautification and protection. When galvanizing is coated, the longevity of the corrosion protection system is greater than the sum of the longevity of the galvanizing alone and the coating system alone. A system that consists of coated galvanizing is generally
Coatings for Galvanizing Read More »
There are several methods by which a coating can protect steel from corrosion. One of the most effective methods is by providing galvanic protection. Galvanic protection works by covering the steel surface with a metal that will preferentially corrode instead of the steel when the surface comes in contact with an electrolyte, usually water. All
Hot Dip Galvanizing Versus Zinc Rich Primers – Which Protects Better? Read More »
An international airport was in the midst of an expansion project. As part of the project, 24-inch-diameter jet fuel piping was being installed by a subcontractor hired by the general contractor that was directly hired by the owner to manage the project. The piping manufacturer installed both the interior and exterior linings. According to the
Airport Jet Fuel Piping Lining Issues Read More »
Failure analysis of coatings and linings often involves systematic analysis and complex engineering logic. There are also many human factors involved. Each coating application involves at least three distinct parties often with different motives and opinions. These parties include the owner of the structure or facility that was painted, the contractor firm that prepared the
Coating Failures/Disputes: Preparing for Litigation Read More »
As a group, coating professionals who deal mainly with industrial coatings generally focus on coating performance — the majority of concern being focusing on a coating’s ability to protect the substrate from the environment — and in the case of tank linings, to protect the tank contents from the substrate. Although these are certainly important
What You See Isn’t Always What You Get: The Problem with Aesthetics Read More »
What Can Happen When the Service Environment Isn’t Characterized or the Wrong Coating is Selected Fig. 1: This tank lining showed insufficient resistance to the acidic tank contents. Photos courtesy of KTA-Tator, Inc. Typically when a premature coating failure is encountered, it is assumed that either there was a mistake made during the surface preparation
Oops, Wrong Paint! Read More »
An American tobacco company owned a number of large buildings, essentially steel-framed warehouses covered with corrugated galvanized steel panels, at one of its facilities. The company used the warehouse buildings for the fumigation of the tobacco, during which the entire interior of the building is filled with a gaseous insecticide that kills tobacco-damaging insects. Unfortunately,
When A Good Idea Goes Bad Read More »
How long does it take for a premature coating failure to occur? The likelihood of failure is high shortly after application: from days to perhaps a year. In this month’s Case from the F-Files, a coating delaminated shortly after installation of the coated assemblies. Repairs were made, and the units went into service. Can failure
The case of…failure in a filter house Read More »
