Characteristics of Corrosion Related to Ash Deposition on Boiler Heating Surface during Cofiring of Coal and Biomass

Table 4

Fitting correlations of corrosion mass gain of different metal samples coated with different fuel ash.

Fuels	Fitting correlations (ΔG = kτ^1/2 + C)	k	R^2
No fuel ash	ΔG = 0.1695τ^1/2 − 0.19802	0.1695	0.98618
50%B1 + 50%C1	ΔG = 0.39923τ^1/2 − 0.36598	0.3992	0.99751
50%B1 + 50%C2	ΔG = 0.37439τ^1/2 − 0.38188	0.3744	0.99388
50%B2 + 50%C1	ΔG = 0.29955τ^1/2 − 0.24879	0.2996	0.99752
50%B2 + 50%C2	ΔG = 0.23953τ^1/2 − 0.11091	0.2395	0.96897
50%B3 + 50%C1	ΔG = 0.19297τ^1/2 − 0.08606	0.1930	0.97963
50%B3 + 50%C2	ΔG = 0.18106τ^1/2 − 0.09793	0.1811	0.97704