From the moment the vessel entered our care, our NATO and EU certified team performed a series of intricate repairs, surface treatments, and coating stages. We bring you this unique behind-the-scenes view to showcase our commitment to quality, attention to detail, and transparency for all stakeholders involved.
Dynamic Co SA sets the industry standard for maritime services with top-notch equipment like Dockboy and Dockmate by Hammelmann, ensuring superior outcomes every time.

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Grit-Blasting & Sand-Blasting: What They Are

Grit-Blasting or Sand-Blasting are surface preparation methods by which a media (like grit or sand) is accelerated through a nozzle by means of compressed air. The specific blasting media used varies depending on the treatment required.

In essence, Grit-Blasting and Sand-Blasting involve forcibly propelling a stream of abrasive material against a surface under high pressure. This technique can smooth a rough surface, roughen a smooth surface, shape a surface, or remove surface contaminants. The pressurized fluid used to propel the media is typically air, or a centrifugal wheel may be employed.

The material selection is paramount in these processes. The various material types—steel shot, steel grit, glass bead, crushed glass, aluminum oxide, silicon carbide, plastic, walnut shell, corn cob, baking soda, ceramic grit, and copper slag—have different characteristics, such as hardness, shape, and density, and each is available in a wide range of particle sizes.

The Scope of Grit-Blasting and Sand-Blasting

These blasting methods find their use in a range of areas:

• Surface Preparation: This is a crucial step before painting, bonding, or other coating operations to ensure the coating adheres properly and lasts longer.

• Removal of Rust, Scale, Sand, or Paint: From fabricated components, blasting can effectively remove these surface contaminants, restoring the surface to a near-original state.

• Roughening of Surfaces: In preparation for thermal spray coating, particularly on industrial gas turbine engine components, these techniques can be used to create a rough surface that enables better adherence of the coating.
• Edge Profiling and Removal of Burrs: On machined components, blasting can help smooth out any rough edges or burrs that could affect the part’s function or safety.
• Cosmetic Surface Finishing: Blasting can provide a matte finish, giving the surface a clean, professional look.
• Removal of Mold Flash: In manufacturing, blasting can help remove excess material (flash) from molded components, ensuring a smooth and uniform finish. Surface Texturing: For tooling and molds, blasting can alter the surface’s appearance and create a specific texture.
• Cleaning and Rust Removal: In maintenance operations, grit or sand blasting can be used to remove dirt, rust, and scale, prolonging the lifespan of the equipment.

The Importance and Benefits of Grit-Blasting and Sand-Blasting

While it’s clear that Grit-Blasting and Sand-Blasting are highly versatile, these techniques are more than just versatile – they are vital. The potential implications of not properly preparing all parts of the vessel or machinery include not only corrosion and high maintenance costs, but in some cases, even safety risks. The wrong coating can require a costly, repetitive and time-consuming maintenance system that constantly disrupts the smooth management and operation of the facility or vessel.

When correctly implemented, Grit-Blasting and Sand-Blasting can offer a host of benefits:

• Superior Adhesion: Properly prepared surfaces allow for better adhesion of paint, coatings, sealants, and other treatments. This leads to a longer-lasting finish, reducing the frequency and costs of maintenance.

• Removal of Contaminants: These techniques effectively eliminate surface contaminants, which can otherwise lead to a host of issues including rust, corrosion, and decay. In turn, this can help to prolong the lifespan of the treated materials or structures.

• Increased Safety: By removing hazards such as rust and burrs, these techniques can make facilities and machinery safer to operate, reducing the risk of accidents.

• Improved Aesthetics: By providing a smoother, cleaner surface, blasting can significantly enhance the visual appeal of structures or objects.

• Efficiency: These methods are highly efficient in covering large areas quickly, making them ideal for industrial-scale projects.

• Versatility: With a wide range of materials available for use as the blasting medium, these techniques can be tailored to suit a variety of needs and applications.

In conclusion, Grit-Blasting and Sand-Blasting are crucial procedures used in various industries. The choice of blasting media, the level of skill, and the attention to detail applied can significantly affect the outcome. At Dynamic Co., we prioritize quality and professionalism. Our well-trained personnel, coupled with top-tier equipment like Hammelmann’s Dockboy and Dockmate, ensure efficient and high-quality blasting services, setting the groundwork for excellent outcomes. We firmly believe that a job well done starts with the right preparation.

The table below gives a summary of the different qualities in surface preparation used by some standards.

Summary of the different qualities in surface preparation used by some standards

Initial condition of steel as per ISO 8501–01

Rust grade	Pictorial example	Description
A		Steel covered completely with adherent mill scale and with, if any, little rust.
B		Steel surface which has begun to rust and from which the mill scale has begun to flake.
C		Steel surface on which the mill scale has rusted away or from which it can be scrapped, but with little pitting visible to the naked eye.
D		Steel surface on which the mill scale has rusted away and on which cosiderable pitting is visible to the naked eye.

Pictorial examples of surface preparation according to ISO 8501–01

Cleaning standard	Initial steel condition
A	B	C	D
St2 – Hand tool cleaning	Not applicable
St3 – Power tool cleaning	Not applicable
Sa1 – Brush-off blast	Not applicable
Sa2 – Commercial blast	Not applicable
Sa2.5 – Near white metal
Sa3 – White metal

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Understanding Hydro-Blasting

Hydro-Blasting, colloquially known as water blasting, is a technique that deploys a high-pressure water stream to dislodge old paint, accumulated chemicals, or other surface buildups. The principal advantage of this method is its non-invasive nature – it efficiently cleans without inflicting any damage to the base material.

Hydro-Blasting finds wide applications for the cleaning of both internal and external surfaces. Its versatility allows the operator to reach and clean challenging areas that may be less accessible with other cleaning methods.

As a well-established practice for stripping or cleaning, Hydro-Blasting effectively removes materials, coatings, or contaminants from various surfaces such as steel plates, pipes, and machinery. At Dynamic Co SA, we not only have comprehensive expertise in all Hydro-Blasting techniques but also specialize in ultra-high-pressure blasting.

The Hydro-Blasting Procedure

High-pressure and ultra-high-pressure Hydro-Blasting utilize water pressurized between 12,000 to 40,000 psi (800bar–2800Bar). This forceful water stream is directed at the surfaces to remove coatings and debris.

Hydro-Blasting employs two primary methods for removal: erosion and delamination. Erosion is typically used on robust, high-performance coatings such as metal and carbide thermal spray coatings. A specially designed nozzle manipulates the water stream into a concentrated, pencil-like spray. Upon impacting the coating surface, this concentrated stream causes the coating to fragment and erode, leaving the underlying substrate unharmed.

A Hydro-Blasting system comprises of multiple subsystems:

• Pump: This component is responsible for pressurizing the water.
• Nozzle: It controls the delivery of the water stream to the target surface.
• Enclosure: This part contains the process, ensuring safety and efficiency.
• Nozzle and part manipulators: These allow for precise control over the process.
• Waste handling equipment: This manages effective disposal of waste generated from the process.
• Process control devices: These are essential for real-time monitoring and regulation of the process.

As an industry leader, Dynamic Co SA is committed to providing our clients with top-quality, eco-friendly, and efficient Hydro-Blasting services.

Water Pressure Ranges and Definitions for Various Cleaning Techniques

Impact of Water Pressure on Cleaning Effectiveness and Production Rates

Advantages of Hydro-Blasting

Hydro-Blasting is a method that holds a significant edge over other conventional processes used for removing coatings. Typically, coatings removed with ultra high pressure blasting have been applied either by the use of chemicals or by other traditional mechanical means such as grit blasting, mechanical tooling, hammering, scraping, or machining.

Chemical cleaning can be expensive, slow, and environmentally unfriendly. Grit blasting or mechanical tooling, while more cost-effective and faster than chemical processing, often fails to adequately separate the coating and the substrate, which can lead to unnecessary material removal.

Hydro-Blasting offers a range of advantages, including:

1. Reduced Waste and Environmental Impact: By using water as the main medium, Hydro-Blasting minimizes the creation of hazardous waste and lowers the environmental footprint. It’s an eco-friendly solution in the realm of industrial cleaning services.
2. Preservation of Substrate: Hydro-Blasting allows for the removal of unwanted materials without damaging the substrate. This is particularly beneficial when dealing with sensitive surfaces.
3. Versatility: This method can be applied to a broad range of surfaces and can effectively clean intricate or hard-to-reach areas that other methods might fail to reach.
4. Cost Efficiency: Hydro-Blasting negates the need for chemicals or abrasive materials, which can be expensive. The process is also time-efficient, leading to decreased downtime and improved productivity.

Ultra High Pressure Water Jetting (UHPWJ

At Dynamic Co SA, we are proud to offer cutting-edge Ultra High Pressure Water Jetting (UHPWJ) services, utilizing state-of-the-art equipment such as Hammelmann’s Dockboy or Dockmate systems. This innovative technology ensures unparalleled quality of work on vessel repairs and maintenance, stripping away coatings, rust, and marine growth efficiently and effectively.
The precision and power of UHPWJ allow for a cleaner, more controlled preparation of surfaces, significantly enhancing the longevity and performance of applied protective coatings.
One of the greatest advantages of opting for UHPWJ services at Dynamic Co SA is the minimal environmental impact this technology offers. Unlike traditional methods, UHPWJ does not produce secondary waste such as grit or chemical pollutants, making it a superior choice for environmentally conscious operations.
For vessels, this means not only a return to service in a shorter timeframe but also an investment in sustainability, preserving marine environments while ensuring compliance with the most stringent environmental regulations.
By choosing Dynamic Co SA for UHPWJ services, our clients benefit from a synergy of quality, efficiency, and ecological responsibility, ensuring their vessels remain in peak condition and regulatory compliance.

Dynamic Co. SA’s Hydro-Blasting Services

Dynamic Co. SA has been providing industry-leading Hydro-Blasting services since our establishment in 1989. Our commitment to quality and environmental sustainability makes us the preferred choice for businesses in search of efficient and eco-friendly surface preparation and cleaning solutions. Our team of dedicated professionals is equipped with the latest Hydro-Blasting technology to deliver precise and thorough cleaning solutions for your business needs.

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At Dynamic Co. SA, we strive to provide not just the best possible coating methods, but also a comprehensive coatings application service that aims to enhance the longevity and performance of your vessel.

The Coating Process

Our specialized coating services follow a meticulous procedure to ensure optimal results:

• Existing Surfaces Evaluation: Our experts thoroughly assess the existing surfaces to identify any existing coatings, corrosion, or other factors that could affect the application of the new coating.
• Environmental Exposure Evaluation: We consider the environmental conditions to which the vessel is exposed. This helps us choose the most suitable coating products and application methods.
• Proper Surface Preparation: As highlighted in our previous post on surface preparation, this step is critical to achieving a long-lasting and effective coating.
• Selection of Coating Products: We offer a wide variety of coatings, including polyurethanes, urethanes, epoxies, textured coatings, silicon, low friction, and more. These are selected based on the needs of your vessel and its operational environment.
• Selection of the Proper Coating Application Method: Depending on the chosen coating product and the condition of the surface, we decide on the most effective application method.
• Definition of Site Conditions: We adjust our application methods and procedures based on the specific conditions of the application site.
• Product and Application Assurance: We ensure the quality of our coating products and the accuracy of our application methods to provide you with the best possible outcome.

The Benefits of Our Coating Services

Our coating application services come with a number of benefits:

• Enhanced Vessel Protection: Our high-quality coatings protect your vessel from corrosion, reducing maintenance costs and prolonging the vessel’s lifespan.
• Safety Assurance: Properly applied coatings enhance the safety of the vessel and the crew by preventing corrosion and other related hazards.
• Operational Efficiency: A well-coated vessel reduces the time and money spent on frequent maintenance, resulting in smoother vessel management and operation.
• Aesthetic Appeal: Our coatings not only protect your vessel but also enhance its aesthetic appeal, projecting a well-maintained and professional image.

At Dynamic Co. SA, our commitment to quality of work and professionalism ensures we deliver a high standard of coating application services. Reach out to us today and experience our commitment to excellence firsthand.

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The Importance of Surface Preparation

Surface preparation involves thoroughly cleaning and treating the exterior surface of a vessel before the application of any coatings. This process not only removes old paint, corrosion, and contaminants, but it also creates an ideal surface for a new protective coating to adhere to. Inadequate surface preparation can lead to premature coating failure, resulting in costly repairs and a decreased lifespan of the vessel.

Our Surface Preparation Methods

At Dynamic Co. SA, we offer a variety of preparation methods designed to meet diverse needs:

• Hydroblasting: Using a high-pressure water jet, this method efficiently removes old coatings, rust, and contaminants from the surface of the vessel.
• Gritblasting: This process uses a high-powered stream of abrasive material to clean and etch the surface, promoting excellent adhesion for the new coating.
• Abrasive Blasting and Sweep Blasting: These methods are ideal for tough surfaces, effectively removing old coatings and creating the perfect surface for the new coating.
• Slurryblasting: A mix of water and abrasive material, slurryblasting is an eco-friendly option that reduces dust and contaminants.
• Sandblasting: An effective and efficient method that cleans and prepares surfaces quickly, ideal for large vessels.

Applying the Coating

After the surface has been expertly prepared, our specialized coating experts proceed to the application of the chosen coating method. We provide a range of options, including polyurethanes, urethanes, epoxies, textured coatings, silicon, low friction, and other specialized coatings. These are carefully selected to meet the specific needs of your vessel, ensuring it’s adequately protected against harsh marine conditions.

The Benefits

Proper surface preparation and coating application bring numerous benefits:

• Increased Vessel Lifespan: By removing harmful corrosion and contaminants, and by applying a new, high-quality coating, you significantly increase the lifespan of your vessel.
• Reduced Maintenance Costs: Proper preparation and application of the coating can reduce the frequency of maintenance, resulting in cost savings over time.
• Improved Efficiency: A well-maintained and coated vessel is more efficient. The reduction in surface friction can lead to improved fuel efficiency.
• Enhanced Appearance: A freshly prepared and coated vessel looks professional and well-maintained, creating a positive impression.

At Dynamic Co. SA, our commitment to quality and professionalism ensures we deliver a high standard of surface preparation and coating application. Reach out to us to experience our commitment to excellence in your vessel maintenance needs.

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