PENGARUH KOMPOSISI DEPOSIT NaCl/Na 2 SO TERHADAP KOROSI TEMPERATUR TINGGI BAJA AISI 4130 YANG DILAPISI ALUMINIUM
Abstract: Steel AISI 4130 is a
combination steelof 1,0 Cr-0,25 Mo-Fe that mostly used for the component heat
axchanger and pipe steam boiler.
However in a high temperature and contain of corrosive gas like klor and
sulfur,the endurance of the corrosion of steel AISI 4130 declines. It is
important to do a research for increasing the endurance of the corrosion of the
steel AISI 4130 with heated Al layered in the surface of steel AISI 4130 Al
layered and oxidized in temperature 750°C during periods 1-49 jam. The
calibration of the corrosion is done with the variation of deposit NaCl/Na The
finding of the research shows that the existence of deposit NaCl/Na2 SO in the
steel Al layered brings a large influence oxidation kinetics steel, it is
proven through the largest value of parabolic constants of the steel AISI 4130
with Al layered with the comparison of deposit
NaCl/Na4(gr):30/70 is 6,89 × 10-9 g2 cm–4 s–1. Whereas the value of
parabolic constants with the comparison of deposit (gr): 100/0 is 2,71 × 10 -9
g2 cm–4 s–1, 50/50 is 6,15 × 10 -9 g2
cm–4 s–12 SO24SO4 , 70/30 is 2,97 × 10 g2 cm –4 s–1 and 0/100 is around 2,60 ×
10 -9 g 2 cm –4s–1. The destruction of
the protective layer Al in the aluminide layer is caused by the existence of
klor dan sulfur from the deposit NaCl/Na2SO4 thattriggersthe growthofiron-rich
ovide (FeO).
Penulis: Yudhistyra Saputra,
Mohammad Badaruddin, Zulhanif
Kode Jurnal: jptmesindd140423
