Posted by S Einfeldt (63.241.173.64) on February 20, 2008 at 15:16:28:
I have a piece of 7075 T73511 alum anodized mil-a-8625 type 2 class 2.It is flaking .003 squares off the anodize surface.A tape lift pulled more particles off.In a SEM EDS 35 % oxygen 46% alum 7.16 sulfur 2.79 copper 2.73 zinc was found. Is the sulfur the result of poor rinsing,should it be there .What is the cause of cracking the anodize and pieces coming off