Is there any danger of chemical reaction between 18-8 stainless steel forms and concrete? What precautions should be taken in using them?
Nothing in portland cement reacts with 18-8 stainless steel forms. Stainless steel is commonly used for molds for mortar and concrete in laboratory research work. It is advisable to clean stainless steel forms very thoroughly between uses. When anything is left on the steel the cement paste will adhere to it tightly. This has sometimes caused damage to the surface when the forms are stripped. Form cleaning should be done so thoroughly that it is almost like polishing. Forms should be treated before use with a good form release agent. Water emulsion release agents, which would rust ordinary steel forms, do not have that effect on 18-8 stainless steel forms and would not be objectionable if they are satisfactory in other respects .