Electrochemical Behavior of a Magnesium Galvanic Anode Under ASTM Test Method G 97-89 Conditions

Genescá, J.; Betancourt, Luis Valadez; Rodríguez, C.

doi:10.5006/1.3292140

Cited by 8 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…S15. † 14,50 In the equivalent circuit of the Mg anode (see Fig. S15 †), R1 includes the electrolyte and current collector resistance, and R2//Q2 and R3//Q3 represent the resistances and constant phase elements (non-ideal capacitance with regard to the suppressed semicircles) of the layers formed at the interface of the Mg anode.…”

Section: Impedance Study Under Dynamic Conditionsmentioning

confidence: 99%

Insights into the electrochemical processes of rechargeable magnesium–sulfur batteries with a new cathode design

et al. 2019

View full text Add to dashboard Cite

show abstract

Section: Impedance Study Under Dynamic Conditionsmentioning

confidence: 99%

Insights into the electrochemical processes of rechargeable magnesium–sulfur batteries with a new cathode design

et al. 2019

View full text Add to dashboard Cite

show abstract

“…More effort has been focused on general corrosion, particularly on the influence of the ion species in solution, and the influence of cathodic impurity elements in the alloy. [20][21][22][23][24][25][26][27][28] The influence of the electrolyte involves many factors such as pH, composition, concentration of the ions and the conductivity of the electrolyte. The influence of conductivity on galvanic corrosion has been studied in terms of "macroscopic" and "microscopic" galvanic cells, [29] and in terms of the Wagner number.…”

mentioning

confidence: 99%

Experimental Measurement and Computer Simulation of Galvanic Corrosion of Magnesium Coupled to Steel

Jia¹,

Song²,

Atrens³

2007

Adv Eng Mater

View full text Add to dashboard Cite

The study of the galvanic corrosion of magnesium becomes increasingly important as the use of magnesium alloys increases rapidly in the auto and aerospace industries due to their advantages of light-weight, adequate mechanical properties and moderate cost. Corrosion, however, limits the application of magnesium alloys. [1][2][3][4][5][6][7] A number of different mechanisms are important for the corrosion. [8][9][10][11][12][13][14] But galvanic corrosion is probably the most important for magnesium because magnesium is the most active structural metal and consequently may suffer serious corrosion when joined to all other common metals of construction, such as aluminum or steel. [1,2,15] Fasteners and their galvanic corrosion is of major concern in automotive applications. [16][17][18] Skar [17] showed that 6000 series aluminum alloy fasteners caused negligible galvanic corrosion of magnesium in the salt spray test. However, steel fasteners are desired for many applications due to their inherently better mechanical properties. Poor compatibility with magnesium was shown by aluminium-coated steel fasteners [18] whereas steel fasteners with zinc or tin-zinc alloy coatings were compatible with magnesium in salt-water exposure. [16] To be able to design a structural component, incorporating galvanic corrosion, it is useful to be able to simulate the galvanic corrosion distribution qualitatively. The research presented in this paper has been undertaken as part of a program to explore that aim. The total corrosion in the area of galvanic corrosion can be considered to be made up of the following two components: (1) galvanic corrosion and (2) self corrosion. The galvanic corrosion is that part of the corrosion, which is directly caused by the coupling of the magnesium to a steel fastener. The self-corrosion is defined as the extra corrosion. Both the galvanic corrosion and the self-corrosion may take the form of more or less general corrosion, or the form of localized corrosion or pitting corrosion.Prior studies of galvanic corrosion of magnesium have been scarce. The earliest study, started in the 1950s by Teeple, [19] investigated the influence of location and climate. This study revealed that different locations produced different corrosion rates because of the different electrolyte properties of the condensed film on the metal surface. [19] Atmospheric galvanic corrosion could be detrimental for magnesium in one location whilst it was almost harmless in another location. This provided helpful information to select magnesium for a particular location. However, the study was time consuming. It is often not practical to wait years to have the test results for each particular service location. Limited studies have addressed the effect of electrolyte on the galvanic corrosion of magnesium. More effort has been focused on general corrosion, particularly on the influence of the ion species in solution, and the influence of cathodic impurity elements in the alloy. [20][21][22][23][24][25][26][27][28] The influence of the ele...

show abstract

“…In diesem Bereich erwartet man eigentlich die Impedanz des Elektrolyten, die eine reine Reduktanz (ohmscher Widerstand mit Phasenverschiebung f 08) darstellt. Dieser Widerstand kann durch folgende Gleichung beschrieben werden: [22] die Impedanzspektren zwischen 19 kHz und 10 mHz, in [16] zwischen 10 kHz und 1 Hz und in [23] sogar nur zwischen 1 kHz und 5 Hz gemessen. Leider sind die wenigen publizierten Arbeiten, die die EIS im Zusammenhang mit der Magnesiumkorrosion anwenden [16,22,23], aus experimentellen wie methodischen Gru Ènden, weder untereinander noch mit den Messungen in dieser Arbeit gut zu vergleichen.…”

Section: Nichtimplantiertes Magnesiumunclassified

“…R3 repra Èsentiert den Durchtrittswiderstand an freigelegter Metalloberfla Èche und C2 stellt die Doppelschichtkapazita Èt dar. Dies stimmt qualitativ mit dem von J.Genesca et al [16] verwendeten Schaltkreis u Èberein.…”

Section: Nichtimplantiertes Magnesiumunclassified

See 1 more Smart Citation

Das Korrosionsverhalten von sauerstoffionenimplantiertem Magnesium in schwach saurem Elektrolyten

Schneider

Molitor

Richter

2002

Materials and Corrosion

View full text Add to dashboard Cite

Unter atmosphärischen Bedingungen bildet Magnesium Oxidschichten aus, die im wesentlichen aus Magnesiumhydroxid bestehen. Die Schutzwirkung von Mg(OH)2 in sulfat‐, karbonat‐ oder chloridhaltigen Lösungen ist jedoch nur gering [2, 18]. Außerdem kommt es aufgrund kristallographischer Fehlpassung zwischen Magnesium und Magnesiumhydroxid zur Rissbildung in der Hydroxidschicht und metallische Oberfläche wird freigelegt. Mit Hilfe der Ionenimplantation von Sauerstoff (1*1018 O+/cm2) können vergrabene MgO‐Schichten erzeugt werden. In Vorversuchen haben sich durch Implantation erzeugte MgO‐Schichten als erfolgversprechender Korrosionsschutz angedeutet [17]. Kristallographische Spannungen zwischen Metall‐ und Oxidphase werden aufgrund des Gradienten der Sauerstoffkonzentration in der Tiefe des Metallvolumens abgebaut. Die Untersuchungen in schwach saurer Natriumsulfatlösung zeigen, daß die Sauerstoffionenimplantation zu einer deutlichen Verbesserung der Korrosionseigenschaften von Magnesium führt.

show abstract

Electrochemical Behavior of a Magnesium Galvanic Anode Under ASTM Test Method G 97-89 Conditions

Cited by 8 publications

References 0 publications

Insights into the electrochemical processes of rechargeable magnesium–sulfur batteries with a new cathode design

Insights into the electrochemical processes of rechargeable magnesium–sulfur batteries with a new cathode design

Experimental Measurement and Computer Simulation of Galvanic Corrosion of Magnesium Coupled to Steel

Das Korrosionsverhalten von sauerstoffionenimplantiertem Magnesium in schwach saurem Elektrolyten

Contact Info

Product

Resources

About