Some further categories: super duplex and super austenitic.

CORROSION: Chloride Stress Corrosion Cracking Definition: The combination of tensile stress and a specific corrosive environment can crack stainless steels. O. Corrosion behavior of 316L stainless steel coating manufactured using different spraying techniques in different acidic solutions were also studied in Ref.


This mode of attack is termed stress corrosion cracking (SCC). The incubation time for non-uniform attack in chloride containing environments is very short, often only hours or a few days. Chloride stress corrosion cracking (CLSCC) is one the most common reasons why austenitic stainless steel pipework and vessels deteriorate in the chemical processing and petrochemical industries. Corrosion resistance is also affected by cold working, heat treatment, welding, and surface treatments. A. Chloride ions in water will attack many stainless steels. Corrosion of Stainless steel 316 L in Various Aqueous Salt Solutions Nawal Muhammad Dawood Collage of Materials Engineering - Babylon University Abstract The change with time in the corrosion rate and corrosion current density on an austenitic stainless steel 316 L electrode in various aqueous salt solutions have been carried out using total immersion test and Tafel extrapolation curves. This level of chloride is considered to be the limit for the 18-8 alloys, particularly if crevices are present. Unless protected, using these Stainless Steel Grades in sea water or other environments where they are susceptible to corrosion is not recommended.

There are 5 SS families -- austenitic, ferritic, martensitic, precipitation-hardening and duplex. Note: To print, please click here. They observed that coatings manufactured by HVOF had low oxidation, were harder and showed better corrosion behavior than the coatings manufactured by atmospheric plasma spray or shrouded plasma spray.
in fact "stainless" is a misnomer - all stainless steels are only corrosion resistant and their resistance is dependent on their working environment and the alloy used.

Chloride/Chlorine Levels and Stainless Steel Alloy Selection. This mode of attack is termed stress corrosion cracking (SCC). The 304 and 304L (18-8 stainless steel alloys) have been utilized very successfully in fresh waters containing low levels of chloride ion of up to 100 ppm. In order to provide matching properties with parent metal, filler metal SMA 316L is commonly produced with slightly over alloyed composition. 316L Stainless Steel Chemical Compatibility Chart ver 10-Jan-2020 industrials Key to General Chemical Resistance [all data based on 72 ° (22 °C) unless noted] Explanation of Footnotes 1 – Satisfactory to 120° F (48° C) A = Excellent – No Effect C = Fair - Moderate Effect, not recommended

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