Stainless steel hydrostatic testing, chloride ion pretreatment
Thread Content
During the hydrostatic testing of stainless steel, if the chloride ion level is too high, a sodium nitrate solution can be added as a pretreatment step……and then the hydrostatic testing can proceed. What is the principle behind this?···
It can be used even if it exceeds the standards. Just blow it dry after use to ensure no water remains. The water also needs to be dealt with; really 2...
2# lxhan_cin Sometimes, after the hydrostatic test is completed, the water is not drained immediately... In such cases, it is necessary to control the concentration of chloride ions in the water···
Nitrate acts as a corrosion inhibitor in the presence of chloride-induced corrosion; the nitrate ions are reduced to nitrite ions, which facilitate the formation of a protective passivation film on iron ions. In the presence of chlorides, the destructive effect of chloride ions competes with the film-forming repair effect of sodium nitrite; corrosion stops when the \"repair\" effect is stronger than the \"destructive\" effect