Sacrificial anode Research Papers - Academia.edu (original) (raw)
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The effect of zinc and tin addition to pure aluminum was investigated in 3 wt.% NaCl solution. The corrosion behavior of the elaborated samples (Al, Al–Zn and Al–Zn–Sn) was studied by open circuit potential, Tafel plot and electrochemical... more
The effect of zinc and tin addition to pure aluminum was investigated in 3 wt.% NaCl solution. The corrosion behavior of the elaborated samples (Al, Al–Zn and Al–Zn–Sn) was studied by open circuit potential, Tafel plot and electrochemical impedance spectroscopy. For the microstructure characterization, Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy were used. The aluminum activation increases in the following order: Al < Al–5Zn < Al–5Zn–0.1Sn < Al–5Zn–0.2Sn < Al–5Zn–0.4Sn. The impedance measurements and the microscopic observations confirmed the great activity of Al–Zn and Al–Zn–Sn compared to pure Al. The segregation at the grain boundaries leads to intergranular corrosion.
Monitoring visual dan proteksi katodik pada pipa penyalur gas bawah laut sering terkendala akibat kedalaman, arus laut, dan batimetri laut yang akan menyulitkan personil penyelam. Analisis data hasil monitoring visual dengan data rekaman... more
Monitoring visual dan proteksi katodik pada pipa penyalur gas bawah laut sering terkendala akibat kedalaman, arus laut, dan batimetri laut yang akan menyulitkan personil penyelam. Analisis data hasil monitoring visual dengan data rekaman menggunakan Remotely Operated Vehicle (ROV) untuk memonitor kondisi Concrete Weight Coating (CWC), three layer Polyethylen Coating (3LPE) dan kondisi kebutuhan arus proteksi dari bracelet anode akan digunakan sebagai basis data untuk perbaikan bagian yang rusak untuk menjaga intergritas pipa penyalur dari pengaruh lingkungan dan korosi, studi kasus dilakukan dengan data hasil monitoring pada pipa penyalur gas bawah laut dengan material baja karbon API 5L x65, diameter 28inchi dan panjang 90 km
Magnesium is among the anode material usually applied in cathodic protection in soil application. The corrosion behaviour of Mg anode was studied to understand corrosion behaviour of the Mg anode. The electrochemical polarisation test on... more
Magnesium is among the anode material usually applied in cathodic protection in soil application. The corrosion behaviour of Mg anode was studied to understand corrosion behaviour of the Mg anode. The electrochemical polarisation test on the Mg ingot, ascast Mg (99.9 wt% Mg, 0.1wt% Mn) and pure Mg (99.7wt% Mg, 0.2wt% Mn, 0.01wt% Si and 0.047 wt% Fe) were done using potentiostat Gamry G 300. These test were done
to obtained polarisation curve and open circuit potential (OCP). The value of open circuit potential of for as cast Mg, Mg ingot and pure Mg are -1.679 V vs. SCE, -1.546 V vs. SCE and -1.709 V vs. SCE respectively. The corrosion rate exhibits the significantly
different between Mg anodes. The highest corrosion rate achieved by As-cast Mg anode (25.78 um/year). The corrosion current density of the As-cast Mg revealed the highest
value (1.02 A/cm2) compared to Mg ingot and pure Mg. The research found that the different of electrochemical properties were believed resulted by different of alloying elements and processes among these Mg anodes.
It was recently proved that RuO2 can act as an effective surface activator of Al alloy sacrificial anodes. TiO2 has the property of stabilizing RuO2 coating and resisting biofouling on metal surfaces. Hence, a mixed oxide catalytic... more
It was recently proved that RuO2 can act as an effective surface activator of Al alloy sacrificial anodes. TiO2 has the property of stabilizing RuO2 coating and resisting biofouling on metal surfaces. Hence, a mixed oxide catalytic coating of TiO2 and RuO2 can enhance the galvanic performance of Al alloy sacrificial anodes and resists biofouling on the anode surface. In the present work RuO2-TiO2 mixed oxide was coated on Al alloy sacrificial anodes. The large and uniform porous nature of the coating was found to facilitate efficient ion diffusion. The coating persists on the anode even after 3 mo of galvanic exposure. The anode having an optimum combination of the mixed oxide had 70% TiO2 as the major component in the coating. The catalytic coating significantly improved the performance of the anodes to a large extent.
- by Chris Goodier and +1
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- Concrete, Sacrificial anode, Durability of Concrete
An experimental sacrificial cathodic protection system comprised of Zn sheet anodes with an ion conductive gel adhesive was installed to protect an electrically isolated reinforcing steel sub-system in a bridge substructure. The system... more
An experimental sacrificial cathodic protection system comprised of Zn sheet anodes with an ion conductive gel adhesive was installed to protect an electrically isolated reinforcing steel sub-system in a bridge substructure. The system protects epoxycoated rebar.
anized by Universiti Kebangsaan Malaysia (UKM), 3rd - 4th December 2008 at Danau Golf Club, Bangi, Selangor.
The paper is aimed at improving the sacrificial anode characteristics of Al-Mg-Zn alloy for use in marine applications. The researches have shown that using Aluminum alloy Al-Mg-Zn as sacrificial anode can reduce the corrosion rate. This... more
The paper is aimed at improving the sacrificial anode characteristics of Al-Mg-Zn alloy for use in marine applications. The researches have shown that using Aluminum alloy Al-Mg-Zn as sacrificial anode can reduce the corrosion rate. This paper deals with study of effect of various compositions and heat treatments on the sacrificial anode efficiency of the alloy. In this work the alloy Al-Mg-Zn is manufactured with varying compositions, and then they are subjected to heat treatment for different time periods. Then these samples are tested and the efficiency is calculated. The results obtained are studied and the most efficient sample is determined.