19권 4호 107-113 2011 [한국자동차공학회 논문집 ]
| 제목 | 자동차 냉각기 호스용 고무의 전기화학적 복합노화시험 |
|---|---|
| 분야 | 재료 및 RECYCLE |
| 언어 | Korean |
| 저자 | 곽승범(한양대학교), 최낙삼(한양대학교), 서부석(세명기업) |
| Key Words | Electro-chemical degradation test(전기화학적 노화시험), Mechanical strain(기계적 변형률), EPDM rubber(EPDM 고무), Mechanical property(기계적 물성),Coolant(냉각수), Distilled water(증류수), Test temperature (시험 온도) |
| 초록 |
Coolant rubber hoses for automotive radiators under thermal and mechanical loadings can be degraded and thus failed due to the influences of the locally formed electricity. In this study, an advanced test method was developed to simulate the failure problem of the rubber hose. For carbon black filled EPDM (ethylene-propylene dine monomer) rubber used as a radiator hose material the ageing behaviors by the electro-chemical stresses combined with a tensile strain were analyzed. As the tensile strain increased, the current of the rubber specimen reduced indicating an increase of the internal defects and electrical resistance of the rubber specimen. Elongation at break and IRHD hardness rapidly decreased with increasing the ageing time. Both electro-chemical stress and mechanical tensile stress clearly accelerated the degradation of EPDM rubber. |
| 원문(PDF) | 다운로드 |