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However for the condition of permafrost or temperature lower than 20¡ãC, the ductility loss of X100 steel due to hydrogen permeation is comparable to that of X65 steel ¡£ For both X100 and X65 steels, polarization resistance is low and similar in values at temperatures above the freezing point, while increasing more than ten (10) times with only 4¡ãC difference from 1¡ãC to -3¡ãC. µ«ÊÇ£¬¶ÔÓÚÓÉÓÚÇâÉøÈëµÄÓÀÄý̬»òÕßµÍÓÚ20ÉãÊ϶ȵÄx100¸ÖµÄÑÓÕ¹ÐÔËðʧÏ൱ÓÚx65¸Ö¡£x100ºÍx65¸ÖµÄ¼«»¯µç×èµÍ£¬»ù±¾µÈÖµÓÚζÈÔÚÄý¹ÌµãʱµÄÊýÖµ£¬È»¶ø´Ó-3ÉãÊ϶ȱ仯µ½1ÉãÊ϶ȣ¬ËĶȵIJî±ð£¬½«»áÔö¼ÓÊ®±¶¡£ |

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