Miguel Ángel Rojas García

Miguel Ángel Rojas García

Work History

Work History

Steel Structures Assembly Supervisor

Consorcio Aliplus

Education

Education

Engineer

Universidad Simón Bolívar

Grade Project: 

See my project resume on: 

http://www.avgal.net/pdfs/Boletin_tecnico_N3-A2.pdf

HYDROGEN DAMAGE IN GALVANIZED STEEL

Abstract

The hydrogen damage susceptibility in hot dip galvanized and zinc electrodeposited on steel in sour environment considering the surface roughness effect, microstructure and coating thickness is presented. In spite of their different morphologies and coating corrosion these materials make more difficult hydrogen diffusion due to their barrier effect. The hydrogen diffusion coefficient gives a value between 10-10 and10-12 cm2/s in both coatings. The gradual increase of permeation current density without reaching time lag as well as the smaller damage on hot dip galvanized substrate surface suggests this coating could be more protective against hydrogen permeation due to its thickness and intermetallics. Hydrogen ingress to steel could be delayed by different reticular parameters associated to intermetallics. Zinc electrodeposited barrier effect could be due to defects in coating. There were not differences between coating surface roughness parameters.

Keywords: Galvanized steel, time lag, barrier effect, intermetallics, hydrogen damage. 

Skills

Skills

French

DELF B2: 62/100. Test date: 8/7/2011 Candidate number: 058022-000926   Listening: 13,5/25 Reading: 20,5/25 Writing: 8/25 Speaking: 20/25     DELF B1: 85/100 Test date: 8/7/2011 Candidate number: 058022-000926   Listening: 19/25 Reading: 24/25 Writing: 18/25 Speaking: 20,5/25    

Communicative

CAD Drawings analysis

Curso realizado: Autocad 2D.  Servicio Nacional de Aprendizaje (SENA) Colombia.  Duración: 40 horas.  Fecha de culminación: 8/4/2009  

English speaking

IELTS Overall Band: 6/9 Test date: 24/9/2011 Candidate number: 000704   Listening: 5,5 Reading: 6,5 Writing: 6,5 Speaking: 6   Centro Venezolano Americano (C.V.A): Level 29 approved, may 2011.  

Interest

Materials Science, Civil Engineer, Construction projects, manufacturing, Math and Spanish  teaching, music, swimming, poetry. 

Custom

Listening to the music, swimming, play the flute, piano, reading. 

Certifications

Certifications
Aug 2009 - Nov 2009

ENGLISH DISCOVERIES ADVANCE LEVEL III.

SENA (Servicio Nacional de Aprendizaje, Colombia)
May 2009 - Jun 2009

WELDING CODES AND STANDARDS PRINCIPLES

SENA (Servicio Nacional de Aprendizaje)
Dec 2007 - Jan 2008

INVENTOR 10 / AUTOCAD 2D 2008

ARTS Institute
Jun 2006 - Jul 2006

Theory and Practice of Corrosion, Corrosion Prevention

TOTAL PROF
Apr 2004 - May 2004

II National Students Journeys of Corrosion

Universidad del Zulia