Another popular material for marine environments is grade 316/L stainless steel. To store metal that regularly sits in saltwater, keep the metal submerged completely in oil, antifreeze or kerosene. Saltwater and Metal. Dry the metal thoroughly, especially in crevices and pockets where saltwater lingers. When you decide that stainless steel is the best choice for your marine project, due to its corrosion resistance, durability, and easy maintenance, allow our team to assist you in choosing the most suitable grades and alloys. This combination corrodes, or eats away at, the metal, weakening it and causing it to fall apart. Saltwater corrodes metal five times faster than fresh water does and the salty, humid ocean air causes metal to corrode 10 times faster than air with normal humidity. Marine environments, where the steel is exposed to salt water and sun require special types of stainless steel. It is susceptible to corrosion in these cases. Please contact Stainless Structurals USA for more information about our domestic manufacturing capabilities and our available inventory. There are some conflicting viewpoints about its popular grades, though. The combination of moisture, oxygen and salt, especially sodium chloride, damages metal worse than rust does. Laser fused, wide flange, 304L stainless steel beams have been used as a corrosion resistant building material in theme parks where marine animals are the center attraction, requiring salt water tanks and pools. Bacteria in ocean water also consumes iron and their excretions turn to rust. Stainless steel is a far better material choice than carbon steel or aluminum for these applications. At the same time, bacteria grow in the saltwater which used the hydrogen to corrode the metal as well. The most appropriate stainless steel shapes and profiles are made using the following designations of stainless: 304/L grade of stainless steel is one of the more popular grades for making components that will hold up well when exposed to salt water but not submerged in it. To prevent electrochemical corrosion, consider a galvanized zinc coating or sacrificial cathodes. As the second type of corrosion that occurs when metal is exposed to saltwater for an extended period, anaerobic corrosion leaves deposits that contain sulfates and surround the metal as it sits in saltwater; Hydrogen sulfide is produced which then corrodes metals. We produce and distribute hot rolled and laser fused stainless steel angles throughout the world in both imperial and metric sizes...learn more, We produce and distribute hot rolled and laser fused stainless steel beams throughout the world in both imperial and metric sizes....learn more, We produce and distribute hot rolled and laser fused stainless steel channels throughout the world in both imperial and metric sizes....learn more, We produce and distribute hot rolled and laser fused stainless steel tees throughout the world in both imperial and metric sizes....learn more, We produce and distribute cold drawn stainless steel flats and stainless steel half rounds throughout the world in both imperial and metric sizes....learn more, We produce and distribute laser fused stainless steel tubing throughout the world in both imperial and metric sizes. You will not find hardware or screws in 316 L, the standard is 316 Stainless Steel (without the L) However, there are different grades and alloy compositions of stainless steel that make some stainless products more corrosion resistant than others. This grade is the most commonly used for coastal applications. I pointed out that the reason high-performance boat propellers are made of stainless steel is because stainless steel is highly resistant to corrosion and the salinity of sea water is much much higher than that of a saltwater pool. There is a misconception about stainless steel in that it doesn’t rust or corrode when exposed to water, specifically sea water. The grade of the stainless … Duplex steel products have higher strength than other stainless compositions. 2507 duplex stainless steel is the next generation and considered a super duplex for similar applications. Stainless Structurals manufactures a wide array of standard and custom shapes and profiles in numerous grades and alloys. Texas A&M University: Metal Conservation: Preliminary Steps, Old Marine Engine: Corrosion in Salt Water Marine Engines-Part 1; Mark Stretch. Metal ions dissolve in water and saltwater conducts electricity and contains ions, which attract ions from other compounds. Crevice Corrosion - this is a problem with stainless fasteners used in seawater applications, because of the low PH of salt water. 316 L has become more popular and widely known since Apple began using it in the iWatch.