Monthly Archives: August 2014

PennCoat, Inc. – Industrial Painting with Elastomeric Paint

PennCoat Industrial Painting Elastomeric Coating

Elastomeric Coatings

We often need to protect steel from the elements and from temperature swings. Elastomeric coatings fit the bill quite nicely. The best brands, such as FX-501M from Fox Industries, are made from 100 percent acrylic polymer, which is a long chain of acrylate or methacrylate molecules. The polymer is waterbased and forms a tough, corrosion-protective film on metal. Other ingredients are added, such as diphenyl ketone (a UV-ray protectant) ethylene glycol (an anti-corrosive), and coloring agents.

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Epoxy Coating Failure : Non-Osmotic Blistering

Non-Osmotic Bubbling

In our previous article, we took a close look at osmotic blistering and the toll it takes on coated surfaces. In this article, we’ll examine the other common mechanism of coating failure: non-osmotic bubbling.

Beyond Moisture Damage

As we previously explained, osmotic blistering arises from situations in which coated surfaces are immersed in water or subject to continual high humidity. Water, sometimes driven by temperature gradients, gets under the coating surface, vaporizes and causes the damage we call osmotic blistering. On the other hand, coating damage from causes other than osmotic blistering we call bubbling, though the results of the two are similar.

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Epoxy Flooring Failure ; Osmotic Blistering

Epoxy Flooring Failure Osmotic Blistering
Before and After Pics of Osmotic Blistering – PennCoat, Inc.

Osmotic Blistering

Osmotic blistering occurs when moisture penetrates through the surface of a coating, is trapped beneath the layer of paint or epoxy and creates blisters. It is not an uncommon phenomenon, but the mechanism can be somewhat complex. Generally, blisters form where pressure builds after moisture accumulates at certain locations within a coating film. Blistering is a result of osmosis; non-osmotic bubbling also occurs, but it’s caused by a different mechanism.

Mechanisms

Paints and epoxies form semi-permeable membranes that can resist water, but ultimately water might be able to penetrate the film. Blistering is frequently encountered when coatings are applied to carbon steel and other metals that are then submerged or exposed to high humidity. Several forces come into play, including:

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Fall Protection For Industrial Safety

Rigid Lifelines Fall Safety

Industrial Safety

Industrial safety is a top priority for Penn Coat Inc. and should always be considered in that manner. Some workspaces are located in dangerous areas. A rooftop is a place that needs to be accessed by people who are responsible for building maintenance. When people are working on a roof, they are at a height that could potentially injure or kill them if they fall. Because working at height is so hazardous, it’s important to take some level of precaution to provide a safer environment for people who need to work at height.  However, deciding how to protect people who work at height can be difficult. So, fall protection professionals who work with the American National Standards Institute (ANSI) developed the Fall Hazard Hierarchy.

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PennCoat, Inc – Rust Preventive Industrial Painting

PennCoat's Rust Preventive Industrial Painting

POR-15 Rust Preventive Coating

Steel surfaces that have rusted or that are vulnerable to rust must receive treatment to prevent or remediate the problem. PennCoat has had excellent results with the rust-preventative coating POR-15, which we use as a primer on new steel or on rusted steel that has first been prepared. Unlike the so-called chemical rust inhibitors — which tend to lose effectiveness over time — POR-15 works by forming a tough, hard layer that physically protects metal from water. Exposure to water increases the strength of coating, due to the product’s unique chemistry.

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