presentasi korosi samdan 2011
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Corrosion in big ship01
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02 Outline Corrosion
Big ship
Corrosion in big ship Prevention
Conclusion
Reference
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Corrosion
reaction of materials withsubstances present in their
environment.
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Big ship
Big ships are onemeans of sea transportthat can carry manypassengers
In general, this shipmade of steel plateofAISI E 2512
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Corrosion in big ship
Uniform corrosion
Pitting corrosion
Stress corrosion Errosion corrosion
Crevice corrosion
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Uniform corrosion
Occurred on the plate located at the topof the water and affects nearly all parts ofthe ship
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Pitting corrosion
Pitting corrosion is the degradation ormaterial damage as a result of intensiveattacks that are local and forming sinks
or holes.
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Stress corrosion
Stress Corrosion Cracking orabbreviated as SCC is the failure ofbrittle (brittle failure) of a material
due to the combination of tensilestress and corrosive environments
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Errosion corrosion
Erosion corrosion is the degradationof materials caused by the presenceof high fluid flow on the surface of
the metal or due to the relativemovement between a corrosive fluidwith the surface material. This
corrosion occurs on the bowboulbous (hull bottom) and propellership
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Crevice corrosion
Corrosion Cracks are known to occurbecause of differences in theconcentration of metal ions or oxygen
concentration in the gap with itsenvironment
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Crevice corrosion
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Prevention Cathodic proection
Coating
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Cathodic protection
One of the sacrificial anode cathodicprotection is that by placing a sacrificialanode on the part you want protected.
Usually used on the vessel exposed toseawater, which is the lower hull,propeller - propeller and bulbous bow.
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Coating
One is the prevention of corrosion bycoating one of which is by painting. Bypainting the surface of the boat will be
better protected from direct contact withthe environment. Type of paint is oftenused in painting the ship, among others:
cat boat shopprimer, primer coat, andintermediate coat.
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Conclusion
Corrosion reaction of materials withsubstances present in their environment
Corrosion in bigship : Uniformcorrosion,pitting corrosion, stresscorrosion, crevice corrosion, and errosioncorrosion
Prevention corrosion in bigshipe : cathodicproection and coating
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Reference
Alian, helmi, Ir. 2010. Laju korosi pada baja karbon
menengah dalam lingkungan air laut. Prosiding SNTTM ke-9
http://id.wikipedia.org/wiki/korosi
http://Pusllit.petra.ac.id/Journals/Mechanicals
www.39ipol.biz/id/wiki/anoda.html
www..Indonesianship.com/
.
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Sekian dan terima kasih
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