Checking Weld Composition
Electrolytic etching determines whether certain iron/nickel alloys welded with sufficient quantities of desired filler metal.
Robertson, M. D.↗
Engineering topics
Robertson, M. D.
Publications and source records attributed to Robertson, M. D..
Gas chromatograph injection port protective device
To prevent samples containing foreign matter from poisoning the gas chromatographic columns, a pre-filter insertion is placed in the injection port. The packing becomes a variable reactant, for example, acids are removed by using an alkaline liquid.
Robertson, M. D.↗