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Corrosion Resistance ( 내식성 )

Corrosion Resistance ( 내식성 ). 2010012243 Hwang Chang Seok 2011011460 Kim Sang Hyun 2011011473 Park Young Ju. What is corrosion resistance?. CORROSION?. FORM OF CORROSION. Uniform of general Corrosion. Crevice Corrosion. Stress Corrosion. Galvanic Corrosion. Erosion Corrosion.

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Corrosion Resistance ( 내식성 )

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  1. Corrosion Resistance(내식성) 2010012243 Hwang Chang Seok 2011011460 Kim Sang Hyun 2011011473 Park Young Ju

  2. What is corrosion resistance? CORROSION?

  3. FORM OF CORROSION Uniform of general Corrosion Crevice Corrosion Stress Corrosion Galvanic Corrosion Erosion Corrosion Corrosion Pitting Corrosion Intergranular Corrosion Environment Corrosion

  4. How to prevent corrosion (1/2) • To block water and oxygen : Paint, Oil, Enamel : Passive metal film (ex. Fe₃O₄, Al₂O₃) • Plating : Other metals coated on a metal surface (ex. Fe+Sn, Fe+Zn)

  5. How to prevent corrosion (2/2) • Cathodic protection -Use reactivity of metal : By connecting the greater reactivity metals, a structure made ​​of metal to prevent corrosion • Alloy -Some metal alloy have corrosion resistance. (ex. Cu,Al,Mg Alloy)

  6. FOR EXAMPLE • Bronze [Cu+Sn+Ni] (Adornment) • Stainless steel [St+Cr+Ni] (Building Supplies, Automotive) • Duralumin [Al+Cu+Mg] (Airplane) • Titanium alloys (Airplane) • Nickel and Chromium alloys

  7. ETC • Platinum and Gold - Stability • Plastic - Strong chemical bonding - intentionally weakened (ex : Bbtan) • Ceramic - Metal + non-metal compounds - Strong corrosion resistance At normal temperature

  8. Thank you.

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