Etching on a Mass Scale

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Hello, The manufacturer I work for is trying to set up it's quality department, and with that needs a means of checking its welds. Is there anyway to etch welds on a larger scale than doing each one by one?
Reply:etching is only a small step of a larger procedure (selecting the weld, cutting the part, polishing, etching, evaluation), and due to its sensitive nature I doubt there is an alternative to the human touch fo etching.What exactly are you etching? different metals, different faults you want to check for, ... all require different etching agents and times.
Reply:yes, etching is just the bottleneck (besides taking the measurements) in our process. we are etching two types of metals. the faults we need to check pen, length, throat, undercut, t-min, etc. I've been encouraged to use a 3 bath system, the first being a bath with 30% nitric acid 70% water, the second being a water bath, and the third being an ethanol bath. The process does a good job of etching the part but the rusting occurs quite quickly.
Reply:Try storing your samples in a climate controlled space or maybe an oven  or under atmospheric control. That is no humidity or more likely no oxygen.---Meltedmetal