Coating News, Articles, Industry Resources,

3 Impressive Industrial Coating Projects

The world’s most iconic landmarks are iconic for a reason. They are amazing feats of artistic talent and design that made the world stop and take notice. But we often don’t think about how each of these landmarks stay maintained to continue to look the way they look as each year passes. So read below for three of the world’s most iconic landmarks and their upkeep procedures. If you know of any other impressive coating projects, email me at and I will add it to the list.
Golden Gate Bridge
The simplicity of the Golden Gate Bridge, along with its International Orange coating, has made it the most famous of all bridges. And since its 1937 opening, 2,025,883,491 vehicles have driven across the bridge. But since this famous landmark is exposed to a high amount of fog, salt, and air, there’s ongoing maintenance to prevent rust and corrosion to the steel components.
However, in 1965, the bridge suffered from increased levels of corrosion with its original lead-based paint (primer and topcoat). It was replaced with an inorganic zinc silicate primer and acrylic emulsion topcoat to satisfy air quality (Volatile Organic Compounds or VOC) requirements.
Statue of Liberty
Lady Liberty has stood tall and proud, attracting tourists and locals, for decades. And as it stood overlooking New York, the salt air gave the statue its beloved blue-green hue. But as the years wore on, repairs to both the interior and exterior skin were needed. The interior copper shell and the iron armature were coated in several layers of protective coatings, including coal tar, aluminum, and lead. But they eventually peeled, which contributed to pockets for moisture to get trapped and eventually cause corrosion.
Once the surface was clear of its old coatings, the surface was treated with benzotriazole to prevent any further crevice corrosion. An inorganic water-based zinc primer was applied as a rust inhibitor, then a polyurethane topcoat to provide graffiti protection followed.
Lady Liberty
Eiffel Tower
The Eiffel Tower is one of the world’s most iconic landmarks in a city known for romance. And to make sure it stays that way, the tower gets a fresh paint job every seven years. But on its seventeenth repaint, there were three new requirements:

  1. The tower needed to be cleaned entirely, with more attention and preparation on the corroded areas before any paint was to be applied.
  2. The work had to be inspected.
  3. Safety precautions needed to increase on the site.

To prepare the surface of the tower, all corroded areas are stripped, sanded, and grounded. Then two coats of an oleoglycerophthalic primer containing lead silicate-chromate pigment are applied, which is an excellent primer to against corrosion. It is also flexible for the paints applied on top of it. The finishing coat is applied with an oleoglycerophthalic paint containing basic lead silicate-chromate pigment.
In total, about 60 tons of paint is used to maintain the tower.
Eiffel Tower

TNphoto Tatsuya Nakagawa
Tatsuya Nakagawa is the VP of Marketing and co-founder of Castagra Products, a storage tank and wastewater coatings manufacturing company that is highly acclaimed for its sustainable coatings, cold weather tank coating applications, and its durable frac tank coatings. Castagra is used by the world’s top oil and gas field services companies.