b'After the end of the corrosion life predicted here, Theequationshereinprovideresultsthatarecorrosion to the structural element will begin to average corrosion life predictions.The corrosionreduce the factor of safety built into the design of process is affected by variations in ground waterthe product.If left unprotected, corrosion will adjacenttothepileorpiershaft.Itisalsoeventually cause failure sometime in the future. affected by soil strata typically not homogenous,alongwithotherfactorssuchasdissolvedCaution: Predictions of performance life minerals,imperfectionsinthegalvanization,beyond 50 years may not be accurate. imperfections inthesteel and/ordamagetotheproducts during shipping and installation, etc.Quick-Solve Corrosion Life EstimatingCorrosion Life Tables:The tables that follow downwardfromtheshaftconfigurationandwere developed from Equations 1 and 2 presented horizontally from the selected pH value until theearlier.The values for the pH used in the tables columnandrowintersect.Thisisthe Quick-werebaseduponthevaluesatwhichcorrosion Solve designestimateofcorrosionlifeofthepotential generally changes. steel prior to any loss in capacity.Corrosion of the Torque Anchor Shafts: The Life of Torque Anchor Galvanizing: The vastfirsttwocolumnsofTable5estimatethe majority of steel foundation support products arecorrosionlifeof anungalvanizedTorque specified with corrosion protection applied.At theAnchorshaftbeforethepiledeterioration far right column of Table 5 estimates the corrosionaffects capacity. This table estimates the time for lifeof thegalvanizedcoating.Simplyreadcorrosion to destroy ten percent of the of the pile horizontally across from the pH that most closelyshaft thickness. matches the pH at the job site until the estimatedFind the shaft configuration under the heading of life of the galvanization is found at the far rightthe graph.Next, locate the row that most closely column.Add these two values together to arrive atmatchesthesoilpHonthejobsite.Read the Quick-Solve product corrosion life.TABLE 5. ECP TORQUE ANCHOR & SOIL NAIL LIFE EXPECTANCY ESTIMATES AT FULL LOAD*Plain Steel Life Expectancy at Full Load Hot Dip GalvanizeSoil pH 1-1/2 Square 1-3/4 Square 2 Square 2-7/8 Dia x 3-1/2 Dia x 4-1/2 Dia x 1.7 oz/ft 2 - 3.0 MilsBar Bar Bar 0.262 Tube 0.300 Tube 0.337 Tube (ASTM A123 Grade75)Soil Resistivity 500 ohm-cm4.5 25 yrs 30 yrs 34 yrs 9 yrs 11 yrs 12 yrs5 100+ yrs 100+ yrs 125+ yrs 48 yrs 57 yrs 63 yrs Add 9 years to life8 45 yrs 52 yrs 59 yrs 15 yrs 17 yrs 19 yrs shown at left10.5 25 yrs 30 yrs 34 yrs 9 yrs 11 yrs 12 yrsSoil Resistivity 1,000 ohm-cm4.5 29 yrs 34 yrs 38 yrs 10 yrs 12 yrs 13 yrs5 100+ yrs 100+ yrs 150+ yrs 57 yrs 67 yrs 73 yrs Add 11 years to8 49 yrs 57 yrs 65 yrs 17 yrs 20 yrs 22 yrs life shown at left10.5 29 yrs 34 yrs 38 yrs 11 yrs 12 yrs 13 yrsSoil Resistivity 2,000 ohm-cm4.5 34 yrs 39 yrs 47 yrs 12 yrs 14 yrs 15 yrs5 125+ yrs 125+ yrs 150+ yrs 85 yrs 100 yrs 100+ yrs Add 15 years to8 47 yrs 67 yrs 77 yrs 19 yrs 22 yrs 24 yrs life shown at left10.5 34 yrs 39 yrs 47 yrs 12 yrs 14 yrs 15 yrsSoil Resistivity 5,000 ohm-cm4.5 45 yrs 52 yrs 65 yrs 16 yrs 18 yrs 20 yrs5 150+ yrs 150+ yrs 175+ yrs 100+ yrs 100+ yrs 100+ yrs Add 25 years to8 82 yrs 95 yrs 100 yrs 29 yrs 33 yrs 37 yrs life shown at left10.5 45 yrs 52 yrs 65yrs 16 yrs 18 yrs 20 yrs*SEE IMPORTANT NOTES AFTER TABLE 6.Torque Anchor products are hot dip galvanizing to ASTM A123,Grade 75.This puts a minimum of1.7 oz/ft 2of zinc, which is 3.0 mils (minimum) thickness.ECP Technical Design Manual Corrosion Life2021 Earth Contact Products, L.L.C.2021-09 Chapter 8 - Page 155 All rights reserved'