1、FORD LABORATORY TEST METHOD BL 003-01 Date 2001 0820 1992 05 22 CAVITATION CORROSION CHARACTERISTICS OF LONG-LIFE COOLANT Action Revisions Revised Editorial - no technical change A. Cockman Application This procedure is used to determine the effect of long-life coolant concentrate on the cavitation
2、corrosion of aluminum water pumps. Apparatus Required Test Stand Aluminum water pump erosion test stand (see illustration). Test stand must be assembled as illustrated (parts list included). Water pump assembly - C5AE 8501-E (C5AZ 8501-K) Cylinder front cover - C30E 6059-B Gasket - W/P - C20E 8507-C
3、 (C20Z 8507-B) Gasket - cover - C20E 6020-A (C20Z 6020-A) Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 OC and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same c
4、onditions unless otherwise specified. Procedure 1. Install pump and cover on bench stand. 2. Install test coolant; 15 % concentrate by volume - 85 % Detroit city tap water (Page 5), sight glass to be full. 3. Start up test stand and adjust to the following conditions: (a) (b) (c) (d) Pump speed - 50
5、00 rpm Coolant temperature - 110 +/- 5 OF System pressure (Item #I7 on attached sketch) - 15 psig Pump discharge pressure (Item #23 on schematic) - 25 psig Copyright0 2001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BL 003-01 Note: This pressure is obtained by setting Valve #21 to ful
6、l open position and adjusting Valve #6 to obtain proper pressure. (e) Pump inlet pressure (Item #25) - 16 - 22 inches Hg. Vac. Note: This vacuum reading should result from the above test conditions, however, if there is difficulty in obtaining the proper inlet pressure, Valve #21 may be adjusted to
7、obtain the specified pressures. 4. After the test conditions in Step 3 are obtained, increase the coolant temperature to 245 +/- 5 OF. Do not adjust the inlet or discharge valves at this temperature. Maintain 15 psig system pressure. Operate pump for 1 O0 hours under these test conditions. 5. Remove
8、 pump and cover at completion of 100 h and visually rate performance of test coolant by observing any pitting or metal removal from coolant passages in pump or cover. (See Page 5 for description of rating system.) Chemicals, materials, parts, and equipment referenced in this document must be used an
9、d handled properly. Each party is responsible for determining proper use and handling in its facilities. Page 2 of 6 Copyright O 2001, Ford Glcbal Technologies, Inc FORD LABORATORY TEST METHOD BL 003-01 CAVITATION CORROSION CHARACTERISTICS OF LONG-LIFE COOLANT Aluminum Water Pump Erosion Test Stand
10、Part No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 Descrirtion 1/2 inch steel boiler plate, 9 3/4 inches high by 11 inches wide 1 inch brass tubing, 2 pieces, each 9 inches long Custom brass tube blends to a 2 inch diameter; total length 6 1/2 inch
11、diameter. 1 inch rubber hoses, 2 pieces, each 17 inches long 1/2 inch pipe fittings as follows: 1 - Coupling brazed to #3 3 - 1 1/4 inch nipples 1 -Tee 1/8 inch diameter orifice in common leg of tee 2 - EIS Scott 2 inch valve 2 inch brass nipple, 1 1/2 inches long 2 inch brass 90“ elbow 2 inch brass
12、 nipple, 1 314 inches long 2 inch brass tee with 1 1/2 inch long nipple to tank Brass tank, 4 inch diameter by 17 314 inches high 1/2 inch glass sight tube with fixtures, 14 inches long 3/4 inch pipe fittings Watts pressure regulator, 16 psi Conoflow air pack filter regulator, Model FH-6OXT 3/8 rubb
13、er hose connected to air supply O - 30 psi pressure gage Vacuum relief valve (used during system drain and during cooling) 1 1/2 inch pipe fittings, used for filling system Chromalax Catalog #MT 230A (240 volt, 3000 watts) Scott 2 inch valve, brass 2 hose clamps O - 30 psi, pressure gage 2 inch bras
14、s nipple, 2 pieces - 20 inches of Mercury Vacuum to 20 psi pressure gage or optional monometer 2 1/2 inch brass tee with 2 inch common leg Honeywell thermocouple Thermocouple 2 1/2 inch brass tube, 11 1/2 inches long 90“ brass reducing elbow, 2 1/2 - 2 inches modified to attach heat control Fenwa II
15、 heater control 2 inch nipple, 2 inches long 2 inch hose, 4 inches long 2 hose clamps Page 3 of 6 Copyright O 2001, Ford Glcbal Technologies, Inc FORD LABORATORY TEST METHOD BL 003-01 Part No. Descrbtion 35 36 37 38 39 40 41 42 43 44 45 46 2 inch 90“ elbow modified to attach thermocouple 2 to 1 112
16、inch reducing nipple, 4 112 inches long 314 inch rubber hose, optional for system drain 314 inch valve, optional for system drain 1 112 inch brass elbow 90“ (optional modified for system drain) Hose clamp 1 112 inch rubber hose, 12 inches long (adapt length at assembly) 314 inch diameter sharp edge
17、orifice, 114 inch thick steel, 1 314 inch O.D. 2 hose clamps 318 coupling to connect pressure gage (No. 25) Water pump (front cover) assembly to be tested 15 hp at 5000 rpm motor, runs two test stands 5 hp required to run pump at 5000 rpm, including 20 % safety factor to protect motor. Note: All tub
18、e and hose lengths are approximate. Page 4 of 6 Copyright O 2001, Ford Glcbal Technologies, Inc FORD LABORATORY TEST METHOD BL 003-01 CAVITATION CORROSION CHARACTERISTICS OF LONG-LIFE COOLANT APPENDIX I Average Analysis of Detroit City Water Total Solids Bicarbonates (HC03) Chlorides (Ci) Sulfates (
19、SO,) Silicates (Sioz) Iron (Fe) Calcium (Ca) Magnesium (Mg) Langelier Index at 160 OF PH APPENDIX II Cavitation-Corrosion Rating System Ratinq 10 9 8 7 6 5 4 3 2 1 125.0 ppm 46.0 ppm 8.0 ppm 17.0 ppm 0.5 ppm 0.02 ppm 27.0 ppm 7.0 ppm + 16 7.5 +/- 0.3 No erosion present; no metal loss. Very, very lig
20、ht, slight smoothing or shining of pump surface. Very light, slight roughness similar to sand cast aluminum surface. Light, medium roughness over 10 - 15 % of area; random pitting. Medium-light, roughness over 25 % of area, some very small pits or grooves. Medium, very rough (over 50 % of area) some
21、 small pits or grooves. Medium-severe, pits or grooves. Severe, large and deep pits or grooves, no failure. Very severe, very large or deep pits or grooves. Pump case leaking due to erosion. Page 5 of 6 Copyright O 2001, Ford Glcbal Technologies, Inc FORD LABORATORY TEST METHOD BL 003-01 CAVITATION CORROSION CHARACTERISTICS OF LONG-LIFE COOLANT Aluminum Water Pump Erosion Test Stand Page 6 of 6 Copyright O 2001, Ford Glcbal Technologies, Inc
