[논문]주조 방식 및 압연에 따른 연축전지용 납 합금 기판의 부식 특성

오꽃님; 이규혁; 장희진

doi:10.14773/cst.2021.20.5.315

주조 방식 및 압연에 따른 연축전지용 납 합금 기판의 부식 특성
Effects of Casting Method and Rolling on the Corrosion Behaviors of Pb Alloys for a Lead Acid Battery 원문보기

Corrosion science and technology, v.20 no.5, 2021년, pp.315 - 323

오꽃님 (포스코 기술연구소) , 이규혁 (조선대학교 대학원 첨단소재공학과) , 장희진 (조선대학교 신소재공학과)

Abstract ▼ AI-Helper

In this study, we examined corrosion behaviors of two types of Pb alloys for a lead acid battery comparatively. One containing 6.6 wt% Sn, 36 mg/kg Bi, and 612.4 mg/kg Ca was prepared by twin-roll continuous casting. The other containing 5.2 wt% Sn, 30.5 mg/kg Ag, and 557 mg/kg Ca was made by twin-belt continuous casting. Potentiodynamic polarization tests were performed to evaluate corrosion resistance. Cyclic voltammetry was done to examine oxidation and reduction reactions occurring on the surface of each alloy in 4.8 M H2SO4 solution. Electrochemical test results implied that the Pb alloy prepared with the twin-belt casting method was less stable than that cast with the twin-roll method. Such results might be due to precipitations formed during the casting process. Rolling did not appear to affect the corrosion behavior of the twin-roll samples with Ag < 10 mg/kg, while it reduced the anodic reaction of Ag on the surface of the twin-belt sample with 30.5 mg/kg Ag.

주제어

표/그림 (8)

표 Table 2. Inductively coupled plasma mass spectrometry (ICP-MS) results of Pb based alloy
표 Table 1. Sample designations in this study and their casting method and additional rolling process
그림 Fig. 1. Images of the surface of (a) SC, (b) SR, (c) HC, and (d) HR specimens
그림 Fig. 2. Polarization behaviors of twin-roll casted Pb alloy (a) as-cast and (b) after rolling in deaerated 4.8 M H₂SO₄ solution at room temperature
그림 Fig. 3. Polarization behaviors of continuous twin-belt casted Pb alloy (a) as-cast and (b) after rolling in deaerated 4.8 M H₂SO₄ solution at room temperature
그림 Fig. 5. Cyclic voltammogram of (a) SC and (b) SR in deaerated 4.8 M H₂SO₄ solution at room temperature
그림 Fig. 4. (a) Corrosion potential (E_corr), (b) corrosion current density (I_corr), and (c) critical current density (I_crit) of SC, SR, HC, and HR in deaerated 4.8 M H₂SO₄ solution at room temperature
그림 Fig. 6. Cyclic voltammogram of (a) HC and (b) HR in deaerated 4.8 M H₂SO₄ solution at room temperature

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