Page 354 - Corrosion Engineering Principles and Practice

System Cleanliness No scale observed Basin buildup Heavy scale Valve scale Condenser tube scale No scale observed No scale observed No scale observed No scale observed Slight valve scale No scale observed No scale observed No scale observed

D c −12 4 7 18 11 19 11 202 126 2995 0 5962 1867

Silica A b 52 20 31 48 101 143 101 78 60 95 126 138 85

40 24 38 66 112 162 112 280 186 126
T a 3050 6100 1952

−8 50 −7 5
D c 315 −82 −112 414 402 418 2664 −349 590

Magnesium A b 36 38 168 223 320 607 135 78 78 508 303 2972 20

28 88 483 216 238 495 549 480 496 308 610
T a 3172 2623

13 20 −50 108 147 640 632 680
D c 1264 3634 3982 2860 7862 Theoretical vs. Actual Recirculating Water Chemistry

Calcium A b 43 60 288 180 245 163 200 168 95 270 188 800 68

56 80 238 288 392
T a 803 1464 800 775 3904 4170 3,660 7930

System (Category) 1 (1) 2 (2) 3 (2) 4 (2) 5 (3) 6 (3) 7 (3) 8 (3) 9 (3) 10 (3) 11 (3) 12 (3) 13 (3) T a = theoretical (ppm) A b = actual (ppm) D c = differencel (ppm) TABLE 8.19

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