A few notes on rust prevention on chassis that have been blasted and galvanized on the outside, but not so well on the inside.
I am seeing some vehicles come in on old chassis that have been dipped and are showing signs of internal corrosion, which are very difficult to repair due to the build up of zinc.
Internal corrosion is mainly due to the metal sweating – warm summer days, but cool nights
This is one of the reasons why bulkheads rot so much – you have to understand that the bulkhead is made from several overlapping pieces of unprotected steel, which will sweat and corrode
Galvanizing bulkheads will not stop the internal corrosion, but a rust preventative like Dinitrol will creep between the lavers of steel and not allow water to contact the bare metal.
I have had galvanized bulkheads in the past and had so many issues I no longer fit them
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About Britannica Restorations
I have been involved with Land Rovers since I was 18 – over 40 years ago! Over the years I have picked up a few thing of interest that I thought I would pass on to you guys – and this is my daily job – not a pass time!