Greetings,
As I am reading a few journals about SS316, I found that the steel is also widely regarded as the marine grade stainless steel.
However, I could not find much in details about where and what exactly it is used for in marine.
One of my colleague says maybe 30% of a marine vessel can be made up of stainless steel 316.
Can you please highlighted the use of ss316, where it is used the most in marine industry.. And also is it true that large percentage of a marine vessel can be made up of 30% SS316.
Thank you very much, really appreciated for any answers :)
Dear Dr. Wan Mohamad Ikhmal,
the use of 316 stainless steel in the marine industry is very wide, concentrated mainly on structures, shipbuilding and desalination plants.
In general, it can be said that the chlorides (Cl-), typical of the marine environment, are the main "enemies" of stainless steel, as they are able to "break" the film of passivity and to hinder its reformation; the concentration of chloride ions and acidity (pH) are together with the temperature factors to be well investigated when choosing the type of material. Sulfur dioxide (SO2, deriving from the combustion of fossil fuels), fumes, dust and carbonaceous particles (deriving from unburnt products), primary contaminants of marine-industrial areas should also not be overlooked.
Fundamental factors become the chemical composition of stainless steel and, appearance too often overlooked, the surface finish. The latter actually plays a very important role, avoiding, at times, the use of too noble alloys. In this context it is necessary to consider that stainless steels are often put into operation without protective coatings, entrusting their durability to the intrinsic resources of surface self-passivation.
Particular attention must also be paid to avoiding crevice corrosion and any couplings capable of generating galvanic corrosion.
Best regards,
Pierluigi Traverso
Dear Dr. Pierluigi Traverso ,
Thank you very much for your answer sir. It is really helpful and I'm really appreciate it :)
Wan Mahammad
316 and 316L Stainless steels are expensive materials, but have good corrosion resistance in marine as well as other hazardous environment and thus they are extensively used in refineries, desalination plants, concrete reinforcement bars, boats, offshore buildings, and for decorative objects, etc.
Dr.K
Wan Mohamad
Further to my above comments, to get more information on stainless steels, then go to university Library and look at the books on Stainless Steels, Also look at the chapters on stainless steels in any metallurgy or materials science books, or ASM Handbook, volumes - 1 and 13 and see chapters on stainless steel. Also search on Google online to get more information on application of stainless steels usage in marine and offshore environment. Also find out more on SS from Nickle Institute office on Google or phoning their office in capital cities. Hope this helps. Good luck.
Dr. K
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