bigben2k:
For the heater core, as far as I have seen, instead of steel they use brass or Al (material similar to rad tank). Better yet, some hard plastic sleeve. There are alternatives to this but I am sure someone of your caliber (you) would have found a solution by now.
I am not sure about nickel plate but they do the chrome. Would chrome plating help prevent the corrosion? Compare it with steel pump i.e. would I see any benefit excluding looks?
charlie b:
This question goes to you too charlie. I mean, do you think that cutting oil would react to chrome?
I do not know where to get that PH paper (litmus paper they call it or something). Used it in school years ago
I do not want to call my chemistry teacher for this either.
The cutting oil I have (synthetic one) has amber color (yellow). The low quality one, which I used earlier, used to be of black color that turned milky when mixed with water. I could see some oil floating on top as well. This floating oil used to get ‘mixed’ when circulating in the rig. I used a water cutting oil ratio of 5:1 (I was told 2:1 to be used that was very wrong I guess).
This synthetic one does not form layers. Its color when mixed with water remains same i.e. slightly changes color of water to opaque yellow (hardly noticeable).
In my next post, I shall post few pics to clear things up.
BTW today I visited doc and had a checkup.