**6. References**


Cdl (F/cm2)

Zn27-15%SiC 13.03 7.95e-5 1317.23 278.67 1.35e-03

Zn50-15%SiC 16.48 3.65e-5 ------ 19.33 5.18e-05

Zn-27Al (L-Columnar) 8.85 4.85e-5 94.78 615.29 7.51e-05

Zn-27%Al (L-Equiaxed) 8.56 5.75e-5 87.01 304.59 6.05e-04

Zn-27%Al (L-CET) 9.41 1.04e-4 26.88 193.42 6.51e-04

The highest corrosion resistance or susceptibility to corrosion is a complex function of the alloys and composite composition, structure and the exposed surface, all of which determine

Alloys with a higher aluminum content have a higher corrosion resistance, mainly due to

Even at a higher Al concentration, the corrosion resistance depends on the structure of the

The results also indicate that the corrosion resistance of Zn-Al-SiC and Zn-Al-Al2O3 MMCs composites has demonstrated the improvement in comparison to ZA alloys in 3wt% NaCl

The authors would like to thank Consejo Nacional de Investigaciones Científicas y Técnicas

Ares, A.E.; Schvezov, C.E. (2000) Solidification Parameters During the Columnar-to-

Ares, A.E.; Gueijman, S.F.; Schvezov, C.E. (2010) Experimental Study of the Columnar-to-

and Composites, *J. Crystal Growth*, Vol. 312, pp. 2154-2170, ISSN 0022-0248

Equiaxed Transition in Lead-Tin Alloys. *Metallurgical and Materials Transactions A*,

Equiaxed Transition During Directional Solidification of Zinc-Aluminum Alloys

Rct (Ω.cm2)

R1 (Ω.cm2)

C1 (F/cm2)

R (Ω.cm2)

Zn-27%Al – 8%CSi 14.47 9.22e-5 228.77

Zn-27%Al – 15%Al2O3 12.60 6.94e-5 151.78

Zn-27%Al – 8%Al2O3 11.64 4.22 e-5 139.57

the protective characteristics of the film that formed on the alloys.

Table 3. Principal parameters obtained from the EIS analysis.

Alloy / Composite (wt pct)

**4. Conclusions** 

alloys.

solutions.

**5. Acknowledgment** 

**6. References** 

the formation of a protective film.

(CONICET) for the financial support.

Vol. 31, 1611-1625, ISSN 1073-5623/83


**3** 

*Germany* 

**Corrosion Resistance of High Nitrogen Steels** 

Nitrogen as an alloying element has been known and used in technical applications since

Nitrogen in low alloy steels is undesirable due to the formation of brittle nitrides. However, the use of nitrogen in high alloy steels has an array of advantages that makes it appear interesting as an alloying element. In references one find this sufficiently researched, so that in this situation only the most important points need to be summarized [Dailly & Hendry,

These as HNS-Alloy (**H**igh **N**itrogen **S**teels) specific material group are characterised through an interesting material profile, i.e. a combination of strength and corrosion

A state-of-the-art production routine is P-ESR melting (pressurised electro slag remelting) which will be covered within the following section. Austenitic steels as well as martensitic steels can be manufactured and are suitable for forging and hot rolling. Some basic knowledge about the material characteristics is mandatory to avoid any potential issues at plastic deformation, heat treatment and to maintain the excellent

This chapter will not cover the fundamentals of corrosion – we assume that the reader will have a basic knowledge about the principles of corrosion. This paper will provide an overview about the role of nitrogen related to corrosion of stainless steels. Since a lot of

the 1940s, initially under the premise for nickel substitution in stainless grades.

1998], [Energietechnik-Essen [ETE], 2011], [Allianz Industrie Forschung [AIF], 2003]:

no formation of tension induced martensite with high cold working rates

**1. Introduction** 

resistance.

corrosion resistance.

**1.2 About this book chapter** 

**1.1.1 Nitrogen in steel** 

**1.1 Some basics about High Nitrogen Steels (HNS)** 

significant increase of strength without restricting ductility

Improvement of corrosion resistance

Extended / stabilized austenite form

Increasing the high temperature tensile strength

Inhibits the discharge of inter-metallic phases

Roman Ritzenhoff and André Hahn

*Energietechnik-Essen GmbH* 

