ENGINEERING.com has updated it's forum.  To post a question please visit the new Ask@ Forum.   

With a database of over 10000 questions the library will remain available for an extended period.
Q&A


panjwani		 Can we use SS 304 L or SS 316 L steel for construction of storage tanks for 95% concentrated Sulphuric Acid View All
Building of 95 % concentrated Sulphuric Acid Transport Tanks
12 years ago - 3 months left to answer. - 1 response - Report Abuse
Respond to question
    0      [lnkReport]        0       0       
Share |
  Responses

davesnadcap
 If the sulphuric acid is at room temperature, either type 304 or 316 should be capable. This comes with a number of precautions, however. At higher temperatures, the resistance to this concentrated acid diminishes. Also, contamination of the acid can reduce the corrosion-resistance capability of these alloys. I presume you are considering the "L" grades in order to weld the tanks and connections. There can be irregularities in the weld surfaces or contaminants left on them that may affect corrosion resistance. Also keep in mind that, when dispensing most of the acid, there may be a small amount left from which the water may evaporate leading to a higher concentration and the initiation of corrosion. When designing or building (or having built) such tanks, consultation with a corrosion engineering expert with experience with this type of acid is recommended (I am not such an expert - therefore I am only giving you general guidelines).

12 years ago

Source: ASM International's Metals Handbook volume(s) on Corrosion is what I consulted. NACE maintains much more detailed databases on the corrosion resistance behavior of many alloys, corrodants, and conditions. ASM and NACE are both professional engineering societies.


  0     0         

ENGINEERING.com does not provide engineering advice. The Ask@ service is a forum for members to exchange ideas relating to the world of engineering. We caution users not to accept any responses that they receive without further validation, and not to rely on any engineering advice that they may get from other members of the Ask@ forum. ENGINEERING.com specifically disclaims any obligation to validate or verify any information posted within the Ask@ service. ENGINEERING.com encourages users to seek the services of a professional engineer for any engineering advice they may require.