classdef Ti < corrodingMetal & handle
%Ti Summary of this class goes here
% Detailed explanation goes here
methods
function obj = Ti(name,ccl,T,pH)
%Ti Construct an instance of this class
% Detailed explanation goes here
obj.Name = name;
obj.cCl = ccl;
obj.T = T;
obj.pH = pH;
obj.MetalMass = 47.88; %Molar mass of Ti, g/mol
obj.OxidationLevelZ = 3; %Ti -> Ti3+ + 3e-
obj.DeltaGMetalPassivation = obj.CalculateDeltaG('Passivation',obj.cCl,obj.pH,obj.T);
obj.BetaMetalPassivation = 0.3;
obj.DeltaGORR = obj.CalculateDeltaG('ORR',obj.cCl,obj.pH,obj.T);
obj.BetaORR = 0.65;
obj.delORR = 0.085; %cm
obj.DeltaGHER = obj.CalculateDeltaG('HER',obj.cCl,obj.pH,obj.T);
obj.BetaHER = 0.75;
obj.delHER = 0.15; %cm
obj.OxideMass = 143.76; %g/mol
obj.OxideDensity = 4.49; %g/cm3
obj.ResistivityOfOxide = 50000.0e9; %Ohm/cm
obj.PassiveCurrentDensity = 1.0e-6; %A/cm2
obj.PassiveFilmThickness = 2.5e-7; %cm
end
function actEnergies = CalculateDeltaG(obj,whichBarrier,ccl,ph,T)
switch whichBarrier
case 'ORR'
%Expression to predict dG_cathodic without pH
%dependence
data = readmatrix('TiORRCoeffs.csv');
p00 = data(1);
p10 = data(2);
p01 = data(3);
p20 = data(4);
p11 = data(5);
p02 = data(6);
dgCathodic_nopH = p00 + p10*ccl + p01*T + p20*ccl^2 + p11*ccl*T + p02*T^2;
dGCmax = 1.1*dgCathodic_nopH;
dGCmin = 0.9*dgCathodic_nopH;
m = (dGCmin-dGCmax)/(13-1);
dgCathodic = m*(ph-13) + dGCmin;
dgAnodic = 800.0e4;
case 'HER'
%Expression to predict dG_cathodic without pH
%dependence
data = readmatrix('TiHERCoeffs.csv');
p00 = data(1);
p10 = data(2);
p01 = data(3);
p20 = data(4);
p11 = data(5);
p02 = data(6);
dgCathodic_nopH = p00 + p10*ccl + p01*T + p20*ccl^2 + p11*ccl*T + p02*T^2;
dGCmax = 1.1*dgCathodic_nopH;
dGCmin = 0.9*dgCathodic_nopH;
m = (dGCmin-dGCmax)/(13-1);
dgCathodic = m*(ph-13) + dGCmin;
dgAnodic = 1000.0e4;
case 'Oxidation'
dgAnodic = 0.0;
dgCathodic = 0.0;
case 'Passivation'
%Expression to predict dG_anodic without pH
%dependence
data = readmatrix('TiPassCoeffs.csv');
p00 = data(1);
p10 = data(2);
p01 = data(3);
p20 = data(4);
p11 = data(5);
p02 = data(6);
dgAnodic_nopH = p00 + p10*ccl + p01*T + p20*ccl^2 + p11*ccl*T + p02*T^2;
dGAmax = 1.1*dgAnodic_nopH;
dGAmin = 0.9*dgAnodic_nopH;
m = (dGAmin-dGAmax)/(13-1);
dgAnodic = m*(ph-13) + dGAmin;
dgCathodic = 80.0e4;
end
actEnergies = [dgCathodic,dgAnodic];
end
end
end