A contractor washed cement plaster off a corrugated, enamel painted metal roof with?

HCL (hydrochloric acid). Roof has a 45 deg pitch. he then washed down the roof. from the next day we then had three days of rain. The owner says the roof must be replaced. She says that the more you add water to HCL, the more corrosive it becomes. I understand that a roof isn't a container and that adding water must (1) dilute it and (2) remove it. can someone please offer some solid scientific answer that may help here. this poor guy needs the factsA contractor washed cement plaster off a corrugated, enamel painted metal roof with?
Hcl eats metal. If there were holes in the enamel the acid when applied would attack the roofing. The damage would be immediate and obvious.





Hcl becomes diluted (weaker) when you add water. If the contractor was careful to rinse well and then you had three days of rain it's hard to imagine any acid residue could have remained or done any damage.





You might buy one piece of roofing and duplicate the cleaning and flushing process to see if it damages the metal. This could provide some insights.





good luck.A contractor washed cement plaster off a corrugated, enamel painted metal roof with?
not true, the more water you add to acid , the weaker it is


and for the roof need replaced , that a crock