【Daily Question】【AC Version for Static Equipment...Question 166】June 15, 2019 Multiple-choice questions...Essay questions
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bg4.png【Daily Question】【AC Version for Static Equipment...Question 166】June 15, 2019 Multiple-choice questions...Essay questions .............................................................Reward rules: 3 wealth for participation, 5–10 wealth for answers that are close to the correct ones. ........................................................................... What is the purpose of pickling and passivating pressure vessels made of austenitic stainless steel? Under what circumstances should acid washing and passivation requirements be specified on the design drawings for stainless steel containers? ...................................................................... Answer: ① The purpose is to form a dense passivation film to provide corrosion protection. ②The surfaces of austenitic stainless steel containers and their composite steel plate versions that require corrosion resistance, or stainless steel components that need anti-corrosion protection, must undergo pickling and passivation treatment after heat treatment.
Form a passivation film； Situations where intergranular corrosion may occur.
①The purpose is to form a dense passivation film to provide corrosion protection. ②The surfaces of austenitic stainless steel containers and their composite steel plate versions that require corrosion resistance, or stainless steel components that need anti-corrosion protection, must undergo pickling and passivation treatment after heat treatment.
It forms a dense passivation film to provide corrosion protection. The surfaces of austenitic stainless steel containers and their composite steel plate versions that require corrosion resistance, or stainless steel components that need anti-corrosion protection, must undergo pickling and passivation treatment after heat treatment.
Answer: 1. The purpose of pickling and passivating pressure vessels made of austenitic stainless steel is to form a dense passivation film that provides corrosion protection. 2. For the surfaces of austenitic stainless steel containers and their composite steel plate versions that require corrosion resistance, or for stainless steel components that need anti-corrosion protection and are to undergo acid washing and passivation after heat treatment, the requirements for acid washing and passivation should be specified in the design drawings.
Purpose of pickling and passivation: To form a passivation film on the surface of stainless steel in order to improve its corrosion resistance. For stainless steel containers that require corrosion resistance, acid washing and passivation are generally required.
Removes surface oil and debris, forms a passivation film, prevents contamination by FE ions, and avoids intergranular corrosion
①The purpose is to form a dense passivation film to provide corrosion protection. ②The surfaces of austenitic stainless steel containers and their composite steel plate versions that require corrosion resistance, or stainless steel components that need anti-corrosion protection, must undergo pickling and passivation treatment after heat treatment.
①The purpose is to form a dense passivation film to provide corrosion protection. ②The surfaces of austenitic stainless steel containers and their composite steel plate versions that require corrosion resistance, or stainless steel components that need anti-corrosion protection, must undergo pickling and passivation treatment after heat treatment.