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³í¹®¸í ºÎ½Ä»ý¼º¹° µÎ²²¸¦ ÀÌ¿ëÇÑ ±¸Á¶¿ë °­ÀçÀÇ ºÎ½Ä·® ÃßÁ¤ / Estimation of Mean Corrosion Depth of Structural Steel Using Thickness of Corrosion Products
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¼ö·Ï»çÇ× Çѱ¹°­±¸Á¶ÇÐȸ ³í¹®Áý, Vol.30 No.3 (2018-06)
ÆäÀÌÁö ½ÃÀÛÆäÀÌÁö(153) ÃÑÆäÀÌÁö(9)
ISSN 1226363X
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ÁÖÁ¦¾î ź¼Ò°­ ; ³»Èļº°­ ; ºÎ½Ä»ý¼º¹°ÀÇ µÎ²² ; ºÎ½Ä¼Õ»ó·® ; ºÎ½ÄÃËÁø½ÇÇè ; Carbon Steel ; Weathering Steel ; Thickness of Corrosion Products ; Corrosion Damage ; Corrosion Acceleration Test
¿ä¾à1 ÀϹÝÀûÀ¸·Î ź¼Ò°­Àº ºÎ½Ä¿¡ ´ëÇÑ ±¸Á¶¹°ÀÇ ¼º´ÉÀ» È®º¸Çϱâ À§ÇÏ¿© µµÀåÀ» ÅëÇÏ¿© ³»±¸¼ºÀ» È®º¸ÇÑ´Ù. ÇÏÁö¸¸ µµ¸·¿­È­°¡ ¹ß»ýÇϰųª µµÀåÀÌ ¾ø´Â °­ÀçÀÇ °æ¿ì ºÎ½ÄÀ¸·Î ÀÎÇÑ °­ÀçÀÇ ´Ü¸é¼Õ½ÇÀÌ ¹ß»ýÇÏ°Ô µÈ´Ù. ź¼Ò°­°ú ºñ±³ÇÏ¿© ³»Èļº°­Àç´Â Ç¥¸é¿¡ Çü¼ºµÈ ³ì ÃþÀ» ÅëÇÏ¿© °­ÀçºÎ½Ä ¹ß»ý¼Óµµ¸¦ Á¦ÇÑÇÔÀ¸·Î½á °­Àç ³»±¸¼ºÀ» È®º¸ÇÏ°Ô µÇ³ª, ºÎ½Ä ȯ°æ¿¡ µû¶ó ¹ß»ýÇÏ°Ô µÇ´Â Ç¥¸é ³ì Ãþ¿¡ µû¶ó ºÎ½Ä¼Õ»ó ´Ù¸£°Ô ³ªÅ¸³¯ ¼ö ÀÖ´Ù. º» ¿¬±¸´Â ±¸Á¶¿ë °­Àç·Î »ç¿ëµÇ°í Àִ ź¼Ò°­°ú ³»Èļº°­ÀÇ ºÎ½ÄÀúÇ×¼º´É°ú ¼Õ»ó¼öÁØÀ» ºñ±³ Æò°¡Çϱâ À§ÇÏ¿© ¿°¼öºÐ¹«, °ÇÁ¶ ¹× ½ÀÀ± »óŸ¦ ¸ð»çÇÑ ½Ç³»ºÎ½Ä½ÇÇèÀ» ½Ç½ÃÇÏ¿´´Ù. ź¼Ò°­°ú ³»Èļº°­ÀÇ ³ì Ãþ Çü¼º°úÁ¤°ú ³ì ¾ÈÁ¤È­ °úÁ¤ÀÌ ´Ù¸£¹Ç·Î °­Àç Ç¥¸é¿¡ »ý¼ºµÈ ºÎ½Ä»ý¼º¹°ÀÇ Á¶¼º¼ººÐ ¹× ¹Ì¼¼±¸Á¶¸¦ ºÐ¼®ÇÏ¿´´Ù. ¶ÇÇÑ °­Á¾¿¡ µû¸¥ ºÎ½Ä°¨¼Ò·®°ú ºÎ½Ä»ý¼º¹° µÎ²²¿ÍÀÇ »ó°ü°ü°è¸¦ °ËÅäÇÏ°í, ºÎ½Ä»ý¼º¹° µÎ²²¿¡ µû¸¥ ºÎ½Ä°¨¼Ò·® ÃßÁ¤½ÄÀ» Á¦½ÃÇÏ¿´´Ù.
¿ä¾à2 Carbon steel for steel structures can be ensured its durability from paint coating to maintain the structural performance of the structure against corrosion. However, in the case of steel with paint coating deterioration or unpainted, sectional loss of steel member can be occurred by corrosion problem. Compared with carbon steel, weathering steels ensures its durability from limiting the corrosion rate of the steel determined by corrosion rust layer. However, its corrosion damage can be different depending on the surface rust layer generated by the corrosion environment. In this study, therefore, accelerated corrosion test were carried out to evaluate corrosion resistance and damage level of carbon steel and weathering steel for steel structures. The composition and micro structure of the corrosion products formed on the surface of the steel were analyzed, since the process of forming the rust layer and the stabilization of the rust of carbon steel and weathering steel were different. Also, correlation between the amount of corrosion loss and the thickness of corrosion products according to the steel type was examined and the estimation equation of corrosion loss for structural steel was presented based on the thickness of the corrosion product.
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DOI http://dx.doi.org/10.7781/kjoss.2018.30.3.153