Year completed: 2003
Shipyard: NewPark Shipyard, Brady Island, TX, USA
Coating used: International primer (inorganic zinc) at 3 mils, Mascoat Marine-DTM at 60- 80 mils followed by International polyurethane top coating to 7 mils.
Time to complete: 4 days for 3 coats with a 4-man crew.
Classification society: USCG
This coastal barge is used to transport asphalt. When unloading the product, the customer became frustrated because the off-loading process was very slow. This was a result of the product losing temperature during transport, amplifying its viscosity. Since fuel prices are always becoming more and more expensive, the vessel owner was looking for any idea to help reduce steaming costs once the vessel came back to port after its journey. The owner learned about Mascoat Marine-DTM Thermal Barrier Coating from a friend and fellow vessel owner in the area and saw the product being applied at another shipyard in Louisiana, USA. The owner asked Mascoat to come up with a solution and show that their product could produce energy retention results. The owner wanted cost estimates that could help determine the return on investment.
Mascoat’s thermal engineering department generated a thermal analysis on the barge and determined that the most efficient return on investment was to apply 60-80 mils (1.5-2.0 mm) of coating in a 3-4-coat process on the entire raised trunk area of the transport barge. Mascoat Marine-DTM was identified as being fully stable way beyond the 215°F skin temperatures found regularly on these types of asphalt barges.
After the barge was put back into service, the customer reported steaming times were reduced by as much as 50% during summer months and as much as 34% during winter month transports. Because of Mascoat Marine-DTM, the customer also commented that the product maintained better quality during the transition between ports. The coating’s insulating ability allowed the barge to spend less time at port, therefore the capability to transport more loads over a year period. Return on investment was measured at less than 1 year based on the rising costs of fuel as well as the ability to do more loads over that period.