77. The Action Of Oils On Brass has been determined by the author by using a piece of good sheet brass into which suitable recesses were made for the retention of the various oils. This plate was submitted to the action of the air at temperatures varying from 24° to 37.5° C. (about 76° to 100° F.), for 100 days.
The results of this test are shown in Table IV. A further test, under different conditions, gave results as shown in Table V.
TABLE IV.
Action of Oils on Brass.
Temp. 21° to 37.5° C. = 70° to 100° F. Time 100 days.
| SYMBOLS ACCORDING TO TABLE III. | CONDITION. | |
| OF OIL. | OF BRASS. | |
| E. K. | Light brown. | Brown. |
| W. F. N. | " | " |
| W. C. | " | Light brown. |
| B. & K. | " | " |
| C. L. Co. w. | Spread. | " |
| C. L. Co. No. 1 | Unaltered. | " |
| Glyc. | " | " |
| Sp. | Light brown. | Greenish-brown. |
| Ol. | Green. | Dark greenish-brown. |
TABLE V.
Action of Oils on Brass.
Temp. 5.5° to 21° C. = 40° to 70° F. Time 25 days.
| SYMBOLS ACCORDING TO TABLE III. | CONDITION. | |
| OF OIL. | OF BRASS. | |
| E. K. w. | Very Light Brown. | No change. |
| W. F. N. w. | " " " | " " |
| D. C. S. w. | " " " | " " |
| D. C. S. ch. | " " " | " " |
| D. C. S. cl. | " " " | " " |
| W. C. w. | No change. | " " |
| B. & K. w. | " " | " " |
| S. B. & Co. w. & cl. | " " | " " |
| C. L. Co. w. | " " | " " |
| C. L. Co. No. 1 | " " | " " |
| Glyc. | " " | " " |
| Alb. f. | " " | Very light brown. |
| Alb. s. | " " | Unaltered. |