CEROX Copper Sulphate Passivation Test Solution
The copper sulphate test is used to determine whether stainless steel surface (excluding 400 series) has been passivated correctly or whether it needs to be passivated. It tests for the presence of iron contamination on the surface. When the protective and impermeable passive layer on the stainless steel surface is not formed properly by the passivation process, iron contamination will be present. Iron presences deteriorates stainless steel properties such as reduced corrosion resistance. When iron particles are not removed, stainless steel surface faces a serious risk of corrosion. If the test proves the surface iron contamination, the surface needs to be passivated.
Reaction Time: 8 minutes
Application: Place the solution on the surface to be tested. After the reaction time, if the solution color changes from blue to transparent, the surface has iron contamination. This is an indication that the surface is not passivated correctly or the surface has not been passivated. The surface needs to be passivated. If solution color stays blue, the surface does not have iron contamination. The surface has been passivated correctly and the surface has the passive layer. Once the test is completed, rinse the surface with drinking water.
Application Pre-Caution: When a surface treatment chemical (pickling, etc.) is applied on a stainless steel surface, wash the surface thoroughly and wait for at least 24 hours before applying the test.
Caution: Use goggles, gloves, and appropriate protective clothing during application. In case of skin contact wash the contact area with plenty of water. Store in a cool place away from direct sunlight.
Packaging: 500 ml plastic pack