Identifying diodes?

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i have solar charger (batteryminder brand) adopted use arduino project.
despite claims, thing not weather resistant & board lasted short time.  well; of components lasted short time.  rust not our friend.

10 resistors & 2 diodes rusted thru @ 1 end.  resistors easy identify (except 1 2x thick rest); 2 diodes standard 14n148 type diodes (one bit bigger).  not provide me support or schematics; on own fix it.

there couple other diodes on board looked healthy , similar sizes; unsoldered them test them transistor/component tester.  1 tested out  diode uf=789 , ir=4na; other tested uf=704, ir=10ua -- note able test 1st 1 repeatidly , got similar results; 2nd 1 fails diode , sub 1.5 ohm in 1 direction , .6ohm other... (so have 3 diodes need identify).

is there way know / guess diode work w/o schematic? markings can't see w/o proper magnification?  iow: there way can replace these diodes ?

my camera has dead batteries, i'll go buy if pictures help...
thanks

hi,
do diodes have markings?? use magnifier. physically smaller or larger?

the 2 diodes have silicon (forward voltage .7 v). 


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