mmPY

AcronymDefinition
mmPYMillimeters Per Year
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of Corrosion inhibitor (mM) rate (mmpy) 1 30[degrees]C Blank 35.781 0.20 15.742 0.40 13.552 0.60 9.840 0.80 7.174 1.01 6.711 1.21 5.061 1.41 4.770 2 40[degrees]C Blank 65.517 0.20 18.731 0.40 16.874 0.60 15.364 0.80 12.809 1.01 9.781 1.21 6.846 1.41 5.224 3 50[degrees]C Blank 98.182 0.20 50.175 0.40 48.011 0.60 43.521 0.80 37.540 1.01 35.839 1.21 29.743 1.41 22.585 4 60[degrees]C Blank 468.822 0.20 62.743 0.40 58.770 0.60 50.982 0.80 46.418 1.01 44.730 1.21 36.641 1.41 30.150 S.No.
The corrosion rates of steel calculated for 28 days cured M30 OPC, PPC, and PSC concrete types were found to be 0.0150, 0.0075, and 0.0060 mmpy, respectively.
The corrosion rate values calculated for 90 days cured M30 OPC, PPC, and PSC concrete types were found to be 0.0110, 0.0060, and 0.0035 mmpy, respectively.
Using the above equation on Specimen 1, we obtained a corrosion rate of 1.1018x10-3 mmpy.
We obtained a corrosion potential of -880.70 mV, corresponding to a probability of corrosion of 90% and a rate of corrosion of 1.1026x10-3 mmpy, calculated with the LPR test (Figure 2).
TTF = 10mm / (0.5 mmpy x (l-97%mitigation) = 167 years
The corrosion current was used to calculate corrosion rate in mm per year (mmpy) and inhibition efficiency [14-161.
Table 2: Corrison characteristics of uncoated and sodium titanate-coated 316L SS in SBF solution Sample OCP [E.sub.b] [E.sub.p] [delta]E Corrosion (mV) (mV) (mV) rate (mmpy * 10.sup.-2) Uncoated 316L -205 400 -450 850 3.75 SS Sodium -355 90 50 40 0.87 titanate-coated 316L SS [FIGURE 10 OMITTED]
Corrosion rate (mmpy) = [Mass loss x 87.6/Area x Time x Metal density]
High-strength low alloy steels (HSLA) such as carbon steel linepipe exhibit corrosion rates of approximately 0.2 mmpy (under environmental conditions such as 10 bar CO2 @ 60[degrees]C), whereas CRA materials would exhibit 0.005 mmpy, under the same conditions.
The Corrosion Rate (CR) in mmpy (millimetres per year) has been calculated from Equation 3.
Concentration of HCl (N) CR (mmpy) 0.5 N 0.5047 1.0 N 1.040 2.0 N 6.225 Table 2 Corrosion Rate (from gravimetric method) for the corrosion of Zinc in 2N HCl at two different temperatures (303 K and 333 K).