Common Challenges of Marine Coatings for Corrosion Protection

In the unforgiving environment of the marine industry, protecting vessels and structures from corrosion presents near countless challenges. The constant exposure to saltwater, harsh weather conditions, and physical wear and tear can quickly degrade materials, leading to costly repairs and potential safety hazards. Marine coatings serve as the first line of defense, but the complexity of these environments requires advanced solutions that go beyond traditional methods. In this article, we explore the common challenges faced by marine coatings in corrosion protection and how innovative solutions like TESLAN® are revolutionizing the field.

Environmental Challenges

Few environments on earth are as corrosive as those faced by the marine industry. The harsh elements of both brown water and blue water are challenging today’s marine freight shipping industry in ways never seen before. In addition, stark temperature contrasts between parts of a vessel that are exposed to water versus those that are exposed to sunlight and UV rays presents unique challenges at the splash zone level (but more on that in another article). The bottom line here is that marine coatings must contend with threats of damage from all fronts, including physical impacts and abrasion, reactivity from increased alkaline levels, damaging UV rays, and extreme temperature variances.

Performance Challenges

Naturally, these environmental challenges pose a threat to many marine coatings’ performance and longevity. Although standards like ISO and NORSOK set out to simulate real world conditions, they operate on an accelerated timeline that does not necessarily reflect the performance of a marine coating in its intended setting.

Adhesion

The first challenge comes in the form of coating adhesion. Many marine and offshore coatings contain a mixture of an epoxy film and a series of additives that are meant to enhance corrosion resistance. However, this often comes at the expense of decreasing impact resistance and adhesion. Finding the right formulation to strike an effective balance between these 3 properties is much easier said than done.

Impact Resistance

Impact resistance is a critical factor to coating longevity. However, one of the biggest issues with today’s standard tests is that they do not evaluate offshore or marine coatings for impact resistance at all. Rather, mechanical damage to the coating is assumed from the beginning. This is a massive oversight, as some marine coatings demonstrate greater impact resistance than others.

Corrosion Resistance

Similarly, corrosion resistance is another key performance factor which is not tested in a way that is true to field conditions. By first assuming physical damage to the coating down to the bare metal, corrosion is all but guaranteed. From that point, it is measured in terms of rust creep- a condition that would not occur at all in a marine coating with sufficient impact resistance.

Application & Fabric Maintenance Challenges

While there are many challenges that present themselves once a coated vessel is sent out to sea, the trials truly begin during the application stage. Many of these issues arise repeatedly throughout the life cycle of the coating, especially when conducting routine or as-needed fabric maintenance.

Application

The initial coating application process is where the most time consuming issues usually present themselves. Generally speaking, time itself is the issue- or rather, the costs associated with said application time are what most marine operators have to worry about. Marine coating application can be an extremely lengthy process, typically requiring days’ worth of dry time between coats and even multiple site visits before the job is complete.

Fabric Maintenance

After the initial coating has been applied, regular maintenance presents an ongoing challenge. Not only do failures need to be addressed, but they need to be handled with great care in a way that restores performance, enhances longevity, and minimizes downtime- ideally.

How Tesla NanoCoatings Overcomes These Challenges

Our coatings have been formulated with these challenges- and more- in mind. TESLAN® coatings can not only help protect steel surfaces on seafaring vessels from oxidation, but they can also reduce the risk on-site dangers and costs associated with corrosion damage. Here’s how our remarkable marine coatings get the job done better than the rest.

TESLAN®’s Resilience

TESLAN® testing continues to demonstrate superior performance in the most extreme marine environments, routinely exceeding the standards for offshore coatings set by agencies like ISO and Standards Norway.

TESLAN®’s difference is that it is formulated with carbon nanotubes (CNTs) that assemble into rebar-like structures that make them tough. “Tough” translates into durability advantages over foes like weather, UV light, abrasion and other wear and tear.
Extensive nanotechnology research and development prove that TESLAN®’s patented two-coat system outperforms conventional three-coat paint jobs for superior protection of steel. Whether you have to deal with corrosion on small boats and barges or on transoceanic vessels, TESLAN® provides superior protection. No matter when or where you need TESLAN® coatings, we are able to deliver to your project’s schedule and specifications.

Formulated for Performance & Longevity

Salt water and other corrosive compounds threaten steel’s strength and integrity by posing the risk of oxidation.

Our primer includes zinc, known for its ability to act as a protective coating for steel thanks to its galvanic properties. This means that zinc will oxidize before steel does when exposed to harsh saltwater environments. Electrons from zinc are donated along the CNT quantum network to maximize cathodic protection of the steel beneath. This allows for more efficient use of the metal content in a galvanic primer like ours.

With an affinity for steel and the strength provided by the CNT reinforced film, TESLAN® demonstrates far superior adhesion to any other protective coating. Pull test results routinely exceed 5,500 lbs./sq.in. CNTs’ mechanical properties can be engineered into epoxy and impart those properties into the film. These benefits include tremendous tensile strength, up to 50 times of steel providing outstanding barrier properties, the ability to eliminate microcracking, and prevent film breakdown from weathering. You can expect nothing less from the strongest material known to man.

Engineered for Ease of Application & Fabric Maintenance

TESLAN®’s two-coat system is a formulation featuring carbon nanotubes and their unique mechanical, thermal, and electrical properties. It applies as easily as paint, but demonstrates the toughness of a plating. When applied to ships and marine structures, TESLAN® forms a protective barrier that is stronger than conventional rust-resistant paints and exhibits self-healing characteristics to withstand impacts and abrasions.

Tesla NanoCoatings’ patented wet-on-wet process enables applicators to apply the topcoat only 30 to 45 minutes after the primer has been applied. This method delivers major time and cost savings, along with technologically advanced corrosion protection because the primer and topcoat monolithically bond to each other.

A study was conducted to evaluate the effect that CNTs have in edge retention properties. What the study found is that the incorporation of CNTs into epoxy composite coatings can significantly improve edge retention. Our coatings’ superior edge retention means that stripe coatings are not required on any project, saving you valuable application time and costs.

Protecting marine vessels and structures from corrosion is a complex task that demands more than just standard coatings. TESLAN® coatings, with their unrivaled carbon nanotube technology, offer a breakthrough in durability, flexibility, and ease of application, setting a new standard for corrosion protection in the marine industry. By addressing the unique challenges of marine coatings, TESLAN® not only ensures the structural integrity of vessels but also reduces maintenance costs and downtime, making it the ideal choice for the future of marine protection.