ON THE ACTION OF AIR AND WATER UPON IRON. 43 
Boxe. No. 5. First immersion. 
Wrought Iron and Steel. 
= 










10. ll. | 12. 13. 14, 
SS i] 
BS Wise ahs 
ag | #24 |E¢ 3 A 
e 5 tee) b-} 2 cs “ a 
ca i SEs = 8 Character of Corrosion. Sa 
pes | ere |s* 
; I a 4 n = 
1-559 |0°175 | 0: | Corrosion uniform, no fibre visible siscsccccescceeeeces SSS Be Sars Eas ede Hot 
1-283 | 0:144 | 0: | Corrosion uniform, no fibre Visible .........ssccssscecseecsseteceeeeenerees Hot 
1:459 | 0-164 | 0-. | Corrosion uniform, no fibre visible ..... scwssecdiices -»-|Hot 
1-768 | 0:199 | 0: | Corrosion uniform, fibre indistinctly developed .. ---|Cold’ 
1:341 | 0:051°| 0° | Corrosion uniform, NO fibre eveloped..e..esceseeceersseccsoveeessncsssees Cold 
Lamellar structure just visible at ends, sides and edges. smooth, 
1500 | 0-169 0-4 , Hot 
COLLOMOM WWUOLMD ..0. 0c idtsleshaceceasconccrcnssccscsesccccenensepsece 
1-551 | 0-174 |0- | Corrosion uniform, fibre indistinctly developed on sides and ends. |Hot 
See A i alae ey a mata nL 
1 ‘ F orrosion uniform, fibre indistinctly visible 
0-817 | 9°092 | 0: | Corrosion uniform, NO fibre Visible ......s.ce,.ceeccssenedsceusooeced ai 
ee Shee 0: | Corrosion uniform, fibre tangled, just visible at the dude Pic edaWbawen Cold. 
© 11-552 |0°175 | 0° | Corrosion uniform, no fibre visible ................ Nadloadesueaveesddvorssd Cold 
1395 |0°157 |0- | Corrosion uniform, edges lamellar, sides SMOOth........eseerssseersesees Cold 
0-964 | 0-108 | 0+ | Corrosion uniform, no fibre Visible .............ceceeseeccecceceescescences ; 
1-179 | 0-133 | 0° | Corrosion uniform, fibre just discernible at the ends .............sss00 Cold 
1 023 0-115 | 0- { per tie but slight, no fibre visible, forge scale still on in n 
1-000 | 0-112 | 0: { Corrosion uniform and smooth, fibre fercioned, except on the 
i ends which were SmO0th cis:cccseseesserverseecee feceevecseceeces a 
0-601 | 0-067 O-4 any Raat alae no fibre wsible, except at the ends where ins 4 
1-012 | 0-114 | 0- | Corrosion uniform, smooth, no fibre visible ........+..sesesscceseeseeeees y 
1511 | 0-170 | 0° | Corrosion nearly uniform, crystalline structure developed i in spots. | ,, 
1-035 | 0-119 | 0 { Fibre developed at the ends, sides smooth, but corroded in many 
Small pits..........sceeee0 Pidencesdebicc tecdacteadodeoteneas dears ewed ers ee ” 
2-248 | 0-253 | 0: | Corrosion uniform, smooth, fibre imperfectly discernible all over.s«| ,; 
1-721 | 0-194 |0- | Corroded locally, but without development of fibre.........ceseeereeeee is 
1:028 | 0-115 | 0: | Corrosion uniform, smooth, no fibre developed ..........seeeesee Beene fe 
| Cast and Wrought Iron. First immersion. 
a7 ia 577 | 0 { Corrosion slight at the ends, sides, &c. smooth and black, zinc 
* brittle and readily detached, surface beneath bright. “i 
«J | Paint generally still sound, but gone in blotches where corrosion [} as 
we (6:0 x a5 aw] 
% had taken place, zine oxidized. | hot. 
: 
{ 
“ 
i 
a of the zinc and iron. 

