industries served marine

Marine
 
While cars take a beating on the track boats take just as significant a beating with just as many wear and tear and corrosion issues. Engines have friction and heat issues but there is also the added challenge of keeping parts from rusting due to water and salt corroding metal parts. Whether water skiing on the weekends or competing in high speed competitions HPC has got you covered. When you have put that much money into something you might as well do your best to help it last. HPC can keep your horse power up while protecting it from the constant attack from the wet.

Propeller Test: 

A test was conducted on two marine propellers to provide a barrier to corrosion and a smooth non stick surface to inhibit the growth of marine life. The propellers were coated in HO1 then top coated with SO2 and fitted to a customers boat permanently moored in a marina in the ocean.

After 12 months full time
salt water immersion.

After a water blast to
remove loose debris.

After wiping with a wet cloth the
coating shows no deterioration.

The propellers were blasted cleaned of any previous contamination by thermal degrease and grit blasting. They were then coated with H01 and cured then re blasted to etch the surface and top coated with SO2 non stick solid dry film then cured again. The propellers were then fitted to the boat and left moored in a marina in the ocean for a period of 12 months when the boat was removed for annual inspection and maintenance.

RESULTS

There were no signs of corrosion or pin holes in the coating observed, a small amount of marine growth was seen, less than usual and was able to be easily removed with a water blast and wipe with a wet rag. The boat was returned to the sea without further work to the propellers for a second year.

COMMENTS 

After 12 months full time immersion and some use by the owner the boat was removed from the water to carry out
maintenance and inspect the propellers.  The owner commented that with uncoated propellers there is a drop off in fuel economy due to the marine growth causing parasitic drag, with coated propellers there was no reduction in fuel economy.

SKIN TEMPERTURE REDUCTIONS USING HPC E SERIES COATINGS

Testing was conducted by Marsh Motorsports of New Zealand on a Mercruiser 900 (496 CID) engine to determine the temperature reduction that could be expected on the exhaust headers from the use of E-Series coatings. The coating reduced external skin temperature by 56% (600°F).

The engine was configured as follows:
Engine type: Mercruiser 900

E13 coating was applied to one of the eight header pipes (cylinder 2 on chart below) while the other pipes remained uncoated. The engine was tested on a STUSKA Engine Co. dynamometer between 6000 and 7500 RPM. The external surface temperatures of the header pipes were measured with thermocouples located one inch from the header/head-mounting flange.

Results


Header pipe skin temperature, 1" from flange (degrees F)

RPM
6000
6250
6500
6750
7000
7250
BHP
794.2
823.7
852.3
867.8
874.8
859.8
Cyl. 1
1057
1060
1062
1066
1069
1075
Cyl 2
465
470
474
477
479
483
Cyl. 3
1050
1050
1052
1054
1056
1062
Cyl. 4
1174
1175
1176
1176
1176
1176
Cyl. 5
1069
1070
1072
1075
1076
1080
Cyl. 6
1062
1066
1069
1072
1075
1080
Cyl. 7
1045
1046
1048
1049
1054
1060
Cyl. 8
1055
1057
1058
1060
1062
1065

Mean temp. of cylinder 2 pipe: 475° F
Mean temp. of other pipes: 1078° F

Copyright©2001 High Performance Coatings, Inc. All rights reserved.
HPC Engineering
Revised 8/2001

For more information E-mail our Tech Department or call us at 1-800-456-4721.