Table 2. Wear Coefficient Data Using 4 Percent Ammonium Hydrate Surrogate Fluid Test DateMotor  Speed  (rpm)Sliding  Speed  (m/s)Wear  Coefficient  (mm3/N-m)Motor  Speed  (rpm)Sliding  Speed  (m/s)Wear  Coefficient  (mm3/N-m)Motor  Speed  (rpm)Sliding  Speed  (m/s)Wear  Coefficient  (mm3/N-m)Motor  Speed  (rpm)Sliding  Speed  (m/s)Wear  Coefficient  (mm3/N-m) Temperature, °C Pressure 10-Mar 901.9 4.1982 2.57E-07 901.9 2.9987 6.32E-07 901.9 2.9389 1.18E-06 901.9 3.5984 8.19E-07 52-59 ambient 4.1982 2.63E-07 2.9987 6.37E-07 2.9389 1.16E-06 3.5984 8.30E-07 52-59 ambient 17-Mar 902.6 4.2014 1.74E-07 902.6 3.0010 1.58E-07 902.6 2.4008 6.17E-07 902.6 3.6012 4.45E-07 52-59 ambient 4.2014 1.60E-07 3.0010 4.46E-07 2.4008 6.75E-07 3.6012 4.47E-07 52-59 ambient 18-Mar 600 2.7929 1.66E-07 600 1.9949 4.48E-07 600 1.5959 5.27E-07 600 2.3939 3.95E-07 52-59 ambient 2.7929 1.59E-07 1.9949 4.57E-07 1.5959 4.95E-07 2.3939 4.03E-07 52-59 ambient 20-Mar 300.6 1.3992 1.76E-07 300.6 0.9995 2.74E-07 300.6 0.7996 3.02E-07 300.6 1.1993 2.93E-07 52-59 ambient 1.3992 1.90E-07 0.9995 3.10E-07 0.7996 3.80E-07 1.1993 2.30E-07 52-59 ambient 25-Mar 303.1 1.4109 2.29E-07 303.1 1.0078 2.53E-08 303.1 0.8062 1.11E-07 303.1 1.2093 1.18E-07 52-59 ambient 1.4109 2.61E-07 1.0078 2.27E-07 0.8062 1.05E-07 1.2093 1.86E-07 52-59 ambient 27-Mar 901.8 4.1977 7.09E-08 901.8 2.9984 9.70E-08 901.8 2.2987 2.78E-07 901.8 3.5980 2.05E-07 52-59 ambient 4.1977 5.45E-08 2.9984 7.17E-08 2.2987 2.78E-07 3.5980 2.15E-07 52-59 ambient 31-Mar 302.9 1.4099 1.87E-07 302.9 1.0071 4.05E-07 302.9 0.8057 5.60E-07 302.9 1.2085 3.95E-07 95-98 ambient 1.4099 2.27E-07 1.0071 4.46E-07 0.8057 5.76E-07 1.2085 4.09E-07 95-98 ambient 1-Apr 301.2 1.4020 5.19E-08 301.2 1.0014 1.51E-07 301.2 0.8012 1.74E-07 301.2 1.2017 1.79E-07 95-98 ambient 1.4020 4.02E-08 1.0014 1.45E-07 0.8012 1.84E-07 1.2017 1.72E-07 95-98 ambient 7-Apr 302.7 1.4090 7.18E-08 302.7 1.0064 5.83E-08 302.7 0.8051 1.09E-07 302.7 1.2077 6.44E-08 95-98 ambient 1.4090 7.54E-08 1.0064 5.66E-08 0.8051 1.02E-07 1.2077 7.67E-08 95-98 ambient 9-Apr 600.5 2.7952 5.98E-08 600.5 1.9966 4.94E-08 600.5 1.5973 4.97E-08 600.5 2.3959 5.63E-08 95-98 ambient 2.7952 5.55E-08 1.9966 6.77E-08 1.5973 4.18E-08 2.3959 4.54E-08 95-98 ambient 10-Apr 605.3 2.8175 8.11E-08 605.3 2.0125 1.12E-07 605.3 1.6100 1.25E-07 605.3 2.4150 9.20E-08 95-98 ambient 2.8175 7.25E-08 2.0125 1.12E-07 1.6100 1.39E-07 2.4150 1.05E-07 95-98 ambient 13-Apr 903.7 4.2065 4.99E-08 903.7 3.0047 5.63E-08 903.7 2.4037 6.55E-08 903.7 3.6056 1.35E-07 95-98 ambient 4.2065 6.70E-08 3.0047 2.94E-08 2.4037 6.98E-08 3.6056 1.34E-07 95-98 ambient 14-Apr 903.7 4.2065 5.74E-08 903.7 3.0047 1.11E-07 903.7 2.4037 1.79E-07 903.7 3.6056 1.09E-07 95-98 ambient 4.2065 5.17E-08 3.0047 1.33E-07 2.4037 1.85E-07 3.6056 1.25E-07 95-98 ambient 15-Apr 1200.1 5.5862 3.11E-08 1200.1 3.9902 1.50E-07 1200.1 3.1921 1.83E-07 1200.1 4.7882 1.35E-07 95-98 ambient 5.5862 3.20E-08 3.9902 1.22E-07 3.1921 1.60E-07 4.7882 1.23E-07 95-98 ambient 16-Apr 1200.1 5.5862 2.02E-08 1200.1 3.9902 6.77E-08 1200.1 3.1921 3.85E-08 1200.1 4.7882 1.32E-08 95-98 ambient 5.5862 2.46E-08 3.9902 7.60E-08 3.1921 6.96E-08 4.7882 1.04E-08 95-98 ambient 17-Apr 1510.1 7.0292 2.68E-08 1510.1 5.0209 4.55E-08 1510.1 4.0167 1.18E-07 1510.1 6.0250 8.10E-08 95-98 ambient 7.0292 2.59E-08 5.0209 4.41E-08 4.0167 1.14E-07 6.0250 8.28E-08 95-98 ambientPlan B Plan C Plan D Plan A NASA/CP—2018-219887 510