Posted by Gordon England (22.214.171.124) on 11:10:41 13/10/04
In Reply to: Coatings on Ships posted by Jayme
: Dear Gordon,
: What kind of coating is recommended for underwater sections of the ships prone to corrosion? What sealant would you recommend ... could you let me know of any companies which may the sealant ?
: What would the life expectancy of the coating be for underwater sections of the ships with sealant and without sealant ?
: Thanx in advance,
Arc sprayed aluminium.
Traditionally, special zinc chromate primer (like metcoseal PR-primer)followed by aluminium vinyl sealer (like metcoseal AV), but other sealers or paint systems can also be applied, particularly if fouling is a problem. The aluminium coating is the primary anti-corrosion layer, even after erosion and loss of sealers/paints the aluminium will continue giving protection. Most of the thermal spray consumable providers should have suitable products.
The life expectancy is primarily related to the environment and thickness of coating. 150 micrometres aluminium should give 20 and possibly many more years of protection (assuming no excessive erosion or mechanical damage)The effect of sealers/paint systems is difficult to quantify, but generally should retard the loss of the aluminium coating initially, prolonging life by maybe a few more years.
Nature of Thermal Spray Coatings
Surface Engineering in a Nutshell
Surface Engineering Forum
Thermal Spray Gun Repair Service
Plasma Consumable Parts
Thermal Spray Powder Supplies
Thermal Spray Coatings on Carbon and Glass Fibre Reinforced Polymers
HVOF Coating of Paper Making Roll
Thermal Spray Processes:
Combustion Wire Thermal Spray Process
Combustion Powder Thermal Spray Process
Arc Wire Thermal Spray Process
Plasma Thermal Spray Process
HVOF Thermal Spray Process
HVAF Thermal Spray Process
Detonation Thermal Spray Process
Plasma Flame Theory
Cold Spray Coating Process
Wear and Use of Thermal Spray Coatings
Corrosion and Use of Thermal Spray Coatings
Glossary of Thermal Spray and Surface Engineering Terms
Image Directory for Thermal Spray Coatings
Plasma Gas Flow Information
Plasma Gas Flow Correction Calculator
Links to other interesting sites related to thermal spray and surface engineering
Periodic Table of the Elements
Calculators for Conversion between Units of Measurement
Surface Engineering Message Board Archive
Surface Engineering Message Board Archive Index
© Copyright Gordon England