{"id":2770,"date":"2026-03-06T04:03:48","date_gmt":"2026-03-06T03:03:48","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?p=2770"},"modified":"2026-03-06T04:04:02","modified_gmt":"2026-03-06T03:04:02","slug":"whats-the-best-nickel-alloy-for-corrosion-resistance","status":"publish","type":"post","link":"https:\/\/www.nickelcasting.com\/ja\/whats-the-best-nickel-alloy-for-corrosion-resistance\/","title":{"rendered":"\u8010\u98df\u6027\u306b\u6700\u3082\u512a\u308c\u305f\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306f\uff1f"},"content":{"rendered":"

\u77f3\u6cb9\u5316\u5b66\u3001\u30aa\u30d5\u30b7\u30e7\u30a2\u3001\u304a\u3088\u3073\u5316\u5b66\u51e6\u7406\u90e8\u9580\u306b \u304a\u3051\u308b\u6750\u6599\u306e\u52a3\u5316\u306f\u3001\u5e74\u9593\u6570\u5341\u5104\u30c9\u30eb\u306e\u30b3\u30b9\u30c8 \u3092\u8981\u3059\u308b\u3002\u91cd\u8981\u306a\u30a4\u30f3\u30d5\u30e9\u304c\u3001\u8150\u98df\u6027\u306e\u5f37\u3044\u5869\u5316\u7269\u74b0\u5883\u3001 \u9178\u6027\u6d41\u3001\u9ad8\u6e29\u306b\u76f4\u9762\u3059\u308b\u3068\u3001\u6a19\u6e96\u7684\u306a\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4 \u30c8\u7cfb\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc\u306f\u3001\u5b54\u98df\u3001\u9699\u9593\u8150\u98df\u3001\u5fdc\u529b\u8150\u98df \u5272\u308c(SCC)\u306b\u3088\u3063\u3066\u6025\u901f\u306b\u7834\u640d\u3057\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u91cd\u8981\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u306f\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u306f\u5fc5 \u305a\u3001\u8010\u98df\u6027\u306b\u6700\u3082\u512a\u308c\u305f\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306f\u4f55\u304b\u3068\u3044\u3046\u554f \u3044\u3092\u6295\u3052\u304b\u3051\u307e\u3059\u3002<\/p>\n

\u6750\u6599\u5de5\u5b66\u306e\u73fe\u5b9f\u306f\u3001\u4e07\u80fd\u3067\u7121\u6575\u306e\u5408\u91d1\u306f\u5b58\u5728\u3057\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3067\u3042\u308b\u3002\u6750\u6599\u306e\u9078\u629e\u306f\u3001\u5c40\u6240\u7684\u306a\u5316\u5b66\u7684\u6027\u8cea\u3001\u4f7f\u7528\u6e29\u5ea6\u3001\u69cb\u9020\u7684\u5b89\u5b9a\u6027\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u3068\u308b\u8a13\u7df4\u3067\u3042\u308b\u3002\u6700\u9069\u89e3\u3092\u898b\u3064\u3051\u308b\u305f\u3081\u306b\u306f\u3001\u53d7\u52d5\u6027\u3068\u6d3b\u6027\u6eb6\u89e3\u3092\u652f\u914d\u3059\u308b\u51b6\u91d1\u5b66\u7684\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u5206\u6790\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002.<\/p>\n

\"\u8010\u98df\u6027\u306b\u6700\u3082\u512a\u308c\u305f\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306f\uff1f\"<\/p>\n

PREN\u306b\u3088\u308b\u9ad8\u6210\u7e3e\u306e\u8a55\u4fa1<\/h2>\n

When evaluating the best nickel alloy for corrosion resistance, metallurgists often begin with the Pitting Resistance Equivalent Number (PREN). This predictive index quantifies a metal’s resistance to localized pitting in chloride-bearing environments based on its chemical composition. For Ni-Cr-Mo alloys, the standard formula often incorporates tungsten (W) due to its synergistic effect with molybdenum:<\/p>\n

PREN<\/span>=<\/span><\/span>%<\/span>C<\/span>r<\/span>+<\/span><\/span>3.3<\/span>(<\/span>%<\/span>M<\/span>o<\/span>+<\/span><\/span>0.5%<\/span>W<\/span>)<\/span>+<\/span><\/span>16<\/span>(<\/span>%<\/span>N<\/span>)<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u5408\u91d1C-276 (UNS N10276)\u306f\u3001\u5c40\u6240\u7684\u306a\u653b\u6483\u306b\u5bfe\u3057\u3066\u512a\u308c\u305f\u8010\u6027\u3092\u8a87\u308a\u3001\u9577\u3044\u9593\u3001\u696d\u754c\u306e\u4e3b\u529b\u88fd\u54c1\u3068\u898b\u306a\u3055\u308c\u3066\u304d\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u30d7\u30ed\u30bb\u30b9\u6761\u4ef6\u304c\u3088\u308a\u53b3\u3057\u304f\u306a\u308b\u306b\u3064\u308c\u3066\u3001\u65b0\u3057\u3044\u5408\u91d1\u306f\u4e0d\u52d5\u614b\u6027\u306e\u9650\u754c\u3092\u62bc\u3057\u5e83\u3052\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u3066\u304d\u307e\u3057\u305f\u3002\u4f8b\u3048\u3070\u3001\u5408\u91d159\uff08UNS N06059\uff09\u306f\u3001\u30bf\u30f3\u30b0\u30b9\u30c6\u30f3\u3092\u5b9f\u8cea\u7684\u306b\u6392\u9664\u3057\u3001\u9244\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u4e00\u65b9\u3067\u3001\u30af\u30ed\u30e0\u3068\u30e2\u30ea\u30d6\u30c7\u30f3\u306e\u542b\u6709\u91cf\u3092\u6700\u5927\u5316\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u8457\u3057\u304f\u9ad8\u3044PREN\u3092\u9054\u6210\u3057\u3066\u3044\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u4e3b\u306a\u6545\u969c\u30e2\u30fc\u30c9\u304c\u5869\u5316\u7269\u306b\u3088\u308b\u5b54\u98df \u3067\u3042\u308b\u5834\u5408\u3001\u8010\u98df\u6027\u306b\u6700\u9069\u306a\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u3092\u6c7a\u5b9a\u3059 \u308b\u306b\u306f\u3001\u7834\u58ca\u306e\u53ef\u80fd\u6027\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u3001\u3053\u308c\u3089\u306e\u6b63\u78ba \u306a\u5143\u7d20\u6bd4\u7387\u3092\u8a73\u3057\u304f\u8abf\u3079\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n\n\n\n\n\n
\u5408\u91d1\u30b0\u30ec\u30fc\u30c9<\/strong><\/td>\nUNS\u6307\u5b9a<\/strong><\/td>\n\u30af\u30ed\u30e0 (%)<\/strong><\/td>\n\u30e2\u30ea\u30d6\u30c7\u30f3 (%)<\/strong><\/td>\n\u30bf\u30f3\u30b0\u30b9\u30c6\u30f3\uff08%\uff09<\/strong><\/td>\nPREN\uff08\u7d04\uff09<\/strong><\/td>\n<\/tr>\n<\/thead>\n
\u30a2\u30ed\u30a4625<\/span><\/td>\nN06625<\/span><\/td>\n20.0 – 23.0<\/span><\/td>\n8.0 – 10.0<\/span><\/td>\n–<\/span><\/td>\n45 – 50<\/span><\/td>\n<\/tr>\n
\u5408\u91d1C-276<\/span><\/td>\nN10276<\/span><\/td>\n14.5 – 16.5<\/span><\/td>\n15.0 – 17.0<\/span><\/td>\n3.0 – 4.5<\/span><\/td>\n~68<\/span><\/td>\n<\/tr>\n
\u30a2\u30ed\u30a422<\/span><\/td>\nN06022<\/span><\/td>\n20.0 – 22.5<\/span><\/td>\n12.5 – 14.5<\/span><\/td>\n2.5 – 3.5<\/span><\/td>\n~74<\/span><\/td>\n<\/tr>\n
\u30a2\u30ed\u30a459<\/span><\/td>\nN06059<\/span><\/td>\n22.0 – 24.0<\/span><\/td>\n15.0 – 16.5<\/span><\/td>\n–<\/span><\/td>\n>76<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u9178\u5316\u6027\u30d7\u30ed\u30bb\u30b9\u74b0\u5883\u3068\u9084\u5143\u6027\u30d7\u30ed\u30bb\u30b9\u74b0\u5883<\/h2>\n

PREN\u306e\u30c7\u30fc\u30bf\u3060\u3051\u306b\u983c\u308b\u306e\u306f\u3001\u5371\u967a\u306a\u307b\u3069\u5358\u7d14\u5316\u3057\u3059\u304e\u3067\u3059\u3002\u3042\u308b\u9178\u306e\u6d41\u308c\u3067\u306f\u8010\u98df\u6027\u306b\u6700\u3082\u512a\u308c\u305f\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u304c\u3001\u5225\u306e\u9178\u306e\u6d41\u308c\u3067\u306f\u9178\u5316\u74b0\u5883\u3068\u9084\u5143\u74b0\u5883\u306e\u6839\u672c\u7684\u306a\u9055\u3044\u306b\u3088\u308a\u6025\u901f\u306b\u52a3\u5316\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n

\u7d14\u7c8b\u306a\u5869\u9178(HCl)\u3084\u5e0c\u786b\u9178(H<\/span>2<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>S<\/span>O<\/span>4<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>)\u3001\u967d\u6975\u6eb6\u89e3\u304c\u4e3b\u306a\u8105\u5a01\u3067\u3042\u308b\u3002\u3053\u3053\u3067\u306f\u3001\u9ad8\u3044\u30e2\u30ea\u30d6\u30c7\u30f3\u542b\u6709\u91cf\u304c\u91cd\u8981\u306a\u9632\u5fa1\u6a5f\u69cb\u3068\u306a\u308a\u3001\u6d3b\u6027\u6eb6\u89e3\u306e\u901f\u5ea6\u8ad6\u3092\u9045\u3089\u305b\u308b\u3002\u5408\u91d1C-276\u3068\u5408\u91d1B-3\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u7279\u6b8a\u306a\u6761\u4ef6\u306b\u512a\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>\n

\u9006\u306b\u3001\u6e7f\u3063\u305f\u5869\u7d20\u30ac\u30b9\u3084\u785d\u9178(H<\/span>N<\/span>O<\/span>3<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>)\u3001\u307e\u305f\u306f\u7b2c\u4e8c\u9244\/\u9285\u30a4\u30aa\u30f3\u3092\u542b\u3080\u6d41 \u308c\u3067\u306f\u3001\u91d1\u5c5e\u306f\u5b89\u5b9a\u3057\u305f\u4e0d\u6d78\u900f\u6027\u306e\u9178\u5316\u88ab\u819c\u3092\u901f \u3084\u304b\u306b\u5f62\u6210\u3059\u308b\u30af\u30ed\u30e0\u306b\u4f9d\u5b58\u3059\u308b\u3002\u5408\u91d1C-276\u306f\u30af\u30ed\u30e0\u542b\u6709\u91cf\u304c\u6bd4\u8f03\u7684\u4f4e\u3044\uff08\u7d0416%\uff09\u305f\u3081\u3001\u53b3\u3057\u3044\u9178\u5316\u6761\u4ef6\u4e0b\u3067\u306f\u82e6\u6226\u3092\u5f37\u3044\u3089\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u3001\u5408\u91d122\u307e\u305f\u306f\u5408\u91d159\uff08\u3069\u3061\u3089\u308220% Cr\u3092\u8d85\u3048\u308b\uff09\u304c\u512a\u308c\u305f\u9078\u629e\u80a2\u3068\u306a\u308b\u3002\u3055\u3089\u306b\u3001\u30d7\u30ed\u30bb\u30b9\u306e\u6d41\u308c\u304c\u9084\u5143\u72b6\u614b\u3068\u9178\u5316\u72b6\u614b\u306e\u9593\u3092\u5909\u52d5\u3059\u308b\u5834\u5408\u3001\u8010\u98df\u6027\u306b\u6700\u9069\u306a\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306e\u7279\u5b9a\u306f\u975e\u5e38\u306b\u8907\u96d1\u306b\u306a\u308a\u307e\u3059\u3002\u5408\u91d1C-2000 (UNS N06200)\u306f\u3001\u3053\u306e\u30b8\u30ec\u30f3\u30de\u306e\u305f\u3081\u306b\u7279\u5225\u306b\u8a2d\u8a08\u3055\u308c\u307e\u3057\u305f\u30021.6%\u306e\u9285\u3092\u6226\u7565\u7684\u306b\u6dfb\u52a0\u3059\u308b\u3053\u3068\u3067\u3001\u9084\u5143\u6027\u9178\u306b\u5bfe\u3059\u308b\u8010\u6027\u3092\u5f37\u5316\u3059\u308b\u4e00\u65b9\u3001\u9178\u5316\u6027\u6761\u4ef6\u3067\u306f\u9ad8\u30af\u30ed\u30e0\u3092\u7dad\u6301\u3057\u307e\u3059\u3002.<\/p>\n

\"\u8010\u98df\u6027\u306b\u6700\u3082\u512a\u308c\u305f\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306f\uff1f\"<\/p>\n

\u5fae\u7d30\u69cb\u9020\u306e\u5b89\u5b9a\u6027\u3068\u71b1\u92ed\u654f\u5316<\/h2>\n

\u30d0\u30eb\u30af\u306e\u5316\u5b66\u7d44\u6210\u304c\u7406\u8ad6\u7684\u306a\u6027\u80fd\u3092\u6c7a\u5b9a\u3059\u308b\u304c\u3001\u52a0\u5de5 \u304c\u73fe\u5b9f\u7684\u306a\u6027\u80fd\u3092\u6c7a\u5b9a\u3059\u308b\u3002\u8010\u98df\u6027\u306b\u6700\u9069\u306a\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u3092\u6c7a\u5b9a\u3059\u308b\u969b\u306b\u898b\u843d\u3068\u3055\u308c\u304c\u3061\u306a\u8981\u56e0\u306f\u3001\u71b1\u30b5\u30a4\u30af\u30eb\u3084\u6eb6\u63a5\u6642\u306e\u5fae\u7d30\u69cb\u9020\u306e\u5b89\u5b9a\u6027\u3067\u3059\u3002.<\/p>\n

\u8089\u539a\u90e8\u3092\u6eb6\u63a5\u3059\u308b\u3068\u3001\u71b1\u5f71\u97ff\u90e8 (HAZ) \u306e\u51b7\u5374\u901f\u5ea6\u304c\u9045\u304f\u306a\u308b\u3002C-276\u306e\u3088\u3046\u306a\u30bf\u30f3\u30b0\u30b9\u30c6\u30f3\u3084\u30e2\u30ea\u30d6\u30c7\u30f3\u3092\u591a\u91cf \u306b\u542b\u3080\u5408\u91d1\u3067\u306f\u3001\u3053\u306e\u71b1\u66b4\u9732\u304c\u6709\u5bb3\u306a\u91d1\u5c5e\u9593\u5316\u5408 \u7269\u306e\u6790\u51fa\u3092\u8a98\u767a\u3059\u308b\u3053\u3068\u304c\u3042\u308b\u3002 \u03bc<\/span><\/span><\/span><\/span><\/span>-\u76f8\uff09\u3068\u7c92\u754c\u70ad\u5316\u7269\u304b\u3089\u306a\u308b\u3002\u3053\u308c\u3089\u306e\u6790\u51fa\u7269\u306f\u3001\u5468\u56f2\u306e\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u306e\u8010\u98df\u6027\u5143\u7d20\u3092\u67af\u6e07\u3055\u305b\u3001\u4f7f\u7528\u4e2d\u306b\u6df1\u523b\u306a\u7c92\u754c\u8150\u98df\uff08IGC\uff09\u3092\u5f15\u304d\u8d77\u3053\u3059\u3002.<\/p>\n

Alloy59\u3084Alloy22\u306e\u3088\u3046\u306a\u6700\u65b0\u578b\u306e\u5408\u91d1\u306f\u3001\u8d85\u4f4e \u70ad\u7d20\u3068\u30b1\u30a4\u7d20\u306e\u9650\u754c\u5024\u3092\u7279\u5fb4\u3068\u3057\u3001\u30d0\u30e9\u30f3\u30b9\u306e\u53d6\u308c\u305f\u56fa\u6eb6\u5f37 \u5316\u5264\u3068\u76f8\u307e\u3063\u3066\u3001\u71b1\u5b89\u5b9a\u6027\u3092\u5287\u7684\u306b\u6539\u5584\u3057\u307e\u3059\u3002\u305d\u306e\u7d50\u679c\u3001\u8907\u96d1\u306a\u30de\u30eb\u30c1\u30d1\u30b9\u6eb6\u63a5\u5727\u529b\u5bb9\u5668\u306e \u8010\u98df\u6027\u306b\u6700\u9069\u306a\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u306f\u3001\u30b7\u30fc\u30e0\u30ec\u30b9\u76f4\u7ba1\u30b7\u30b9 \u30c6\u30e0\u306b\u9078\u629e\u3055\u308c\u308b\u5408\u91d1\u3068\u306f\u5168\u304f\u7570\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042 \u308a\u307e\u3059\u3002.<\/p>\n

\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u306e\u30b3\u30f3\u30bb\u30f3\u30b5\u30b9\u3092\u5f97\u308b<\/h2>\n

\u7d50\u5c40\u306e\u3068\u3053\u308d\u3001\u8010\u98df\u6027\u306b\u6700\u9069\u306a\u30cb\u30c3\u30b1\u30eb\u5408\u91d1\u3092\u9078 \u3076\u306b\u306f\u3001\u5e02\u5834\u3067\u6700\u3082\u9ad8\u4fa1\u306a\u30b0\u30ec\u30fc\u30c9\u3092\u63a2\u3059\u306e\u3067\u306f\u306a\u304f\u3001 \u91d1\u5c5e\u5b66\u7684\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u30d7\u30ed\u30bb\u30b9\u6d41\u4f53\u306e\u71b1\u529b\u5b66\u7684 \u304a\u3088\u3073\u5316\u5b66\u7684\u306a\u5b9f\u614b\u306b\u6b63\u78ba\u306b\u9069\u5408\u3055\u305b\u308b\u3053\u3068\u304c\u91cd\u8981\u3067 \u3059\u300210\u2103\u306e\u5909\u5316\u3001pH\u306e\u308f\u305a\u304b\u306a\u4f4e\u4e0b\u3001\u5fae\u91cf\u5869\u5316\u7269\u306e\u6025\u5897\u304c\u3001\u5c40\u6240\u7684\u306a\u52a3\u5316\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u5b8c\u5168\u306b\u5909\u5316\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n

28Nickel\u306e\u51b6\u91d1\u30c1\u30fc\u30e0\u306f\u3001\u7d4c\u9a13\u7684\u306a\u8a66\u9a13\u30c7\u30fc\u30bf\u3001\u96fb\u4f4d\u5dee\u5206\u6975\u66f2\u7dda\u3001\u6df1\u3044\u6545\u969c\u89e3\u6790\u306b\u57fa\u3065\u304d\u3001\u3053\u308c\u3089\u306e\u6b63\u78ba\u306a\u5de5\u5b66\u7684\u30d1\u30ba\u30eb\u3092\u89e3\u6c7a\u3057\u307e\u3059\u3002\u4e88\u671f\u305b\u306c\u6750\u6599\u306e\u52a3\u5316\u306b\u304a\u56f0\u308a\u306e\u5834\u5408\u3001\u307e\u305f\u306f\u65b0\u3057\u3044\u653b\u6483\u7684\u306a\u30d7\u30ed\u30bb\u30b9\u30b9\u30c8\u30ea\u30fc\u30e0\u7528\u306e\u88c5\u7f6e\u3092\u8a2d\u8a08\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u7279\u5b9a\u306e\u74b0\u5883\u30d1\u30e9\u30e1\u30fc\u30bf\uff08\u6e29\u5ea6\u3001pH\u3001\u5869\u5316\u7269\u6fc3\u5ea6\u3001\u9178\u5316\u9084\u5143\u96fb\u4f4d\uff09\u3092\u5f53\u793e\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u30c7\u30b9\u30af\u3068\u5171\u6709\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u53b3\u5bc6\u306a\u51b6\u91d1\u5b66\u7684\u8a55\u4fa1\u3092\u884c\u3044\u3001\u304a\u5ba2\u69d8\u306e\u30a4\u30f3\u30d5\u30e9\u304c\u5fc5\u8981\u3068\u3059\u308b\u6b63\u78ba\u306a\u30b0\u30ec\u30fc\u30c9\u3092\u7279\u5b9a\u3059\u308b\u304a\u624b\u4f1d\u3044\u3092\u3044\u305f\u3057\u307e\u3059\u3002.<\/p>\n

\n

\u95a2\u9023Q&A<\/h3>\n

Q:\u30e2\u30ea\u30d6\u30c7\u30f3\u306e\u542b\u6709\u91cf\u304c\u591a\u3051\u308c\u3070\u3001\u8010\u98df\u6027\u306f\u5fc5\u305a\u5411\u4e0a\u3059\u308b\u306e\u3067\u3059\u304b\uff1f<\/b> A: Not necessarily. While molybdenum is crucial for resisting reducing acids and localized pitting, excessively high molybdenum without a balance of chromium can compromise the alloy’s stability in highly oxidizing environments. Furthermore, over-alloying with Mo can reduce thermal stability, leading to detrimental intermetallic phase precipitation during welding.<\/p>\n

Q: \u30b5\u30ef\u30fc\u30ac\u30b9\u7528\u9014\u3067\u5408\u91d1C-276\u306e\u4ee3\u308f\u308a\u306b\u5408\u91d1625\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u306f\u53ef\u80fd\u3067\u3059\u304b\uff1f<\/b> A: \u53b3\u5bc6\u306b\u306f\u786b\u5316\u6c34\u7d20(H<\/span>2<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>S<\/span><\/span><\/span><\/span><\/span>)\u306e\u6fc3\u5ea6\u3001\u6e29\u5ea6\u3001\u5869\u5316\u7269\u5206\u5727\u306b\u4f9d\u5b58\u3059\u308b\u3002\u5408\u91d1625\u306f\u3001\u8efd\u5ea6\u306e\u30b5\u30ef\u30fc\u74b0\u5883\u3067\u306f\u826f\u597d\u306a \u6027\u80fd\u3092\u793a\u3059\u304c\u3001\u9ad8\u6e29\u306e\u53b3\u3057\u3044\u30b5\u30ef\u30fc\u30ac\u30b9\u6761\u4ef6\u4e0b\u3067 \u306f\u3001SCC\u306e\u5f71\u97ff\u3092\u975e\u5e38\u306b\u53d7\u3051\u3084\u3059\u3044\u3002\u6975\u7aef\u306a\u30b5\u30ef\u30fc\u30ac\u30b9\u74b0\u5883\u3067\u306f\u3001\u5408\u91d1C-276 \u307e\u305f\u306f\u5408\u91d1718 (\u6790\u51fa\u786c\u5316\u72b6\u614b)\u304c\u4e00\u822c\u7684\u306b\u5fc5\u8981\u3068\u3055\u308c\u308b\u3002.<\/p>\n

Q: \u9285\u306e\u6dfb\u52a0\u306f\u5408\u91d1 C-2000 \u306e\u6027\u80fd\u306b\u3069\u306e\u3088\u3046\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u304b\uff1f<\/b> A: Alloy C-2000\u306eNi-Cr-Mo\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u306b\u7d041.6%\u306e\u9285\u3092\u610f\u56f3\u7684\u306b\u6dfb\u52a0\u3059\u308b\u3053\u3068\u3067\u3001\u305d\u306e\u4f7f\u7528\u9818\u57df\u304c\u5927\u5e45\u306b\u5e83\u304c\u308a\u307e\u3059\u3002\u9285\u306f\u3001\u30ab\u30bd\u30fc\u30c9\u53cd\u5fdc\u901f\u5ea6\u3092\u5909\u5316\u3055\u305b\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u9084\u5143\u6027\u9178\uff08\u786b\u9178\u3084\u30d5\u30c3\u5316\u6c34\u7d20\u9178\u306a\u3069\uff09\u3067\u306e\u8150\u98df\u901f\u5ea6\u3092\u5927\u5e45\u306b\u4f4e\u4e0b\u3055\u305b\u3001\u540c\u6642\u306b\u9ad8\u3044\u30af\u30ed\u30e0\u542b\u6709\u91cf\u306b\u3088\u308a\u9178\u5316\u5a92\u4f53\u306b\u5bfe\u3059\u308b\u512a\u308c\u305f\u8010\u6027\u3092\u7dad\u6301\u3057\u307e\u3059\u3002.<\/p>","protected":false},"excerpt":{"rendered":"

Material degradation in the petrochemical, offshore, and chemical processing sectors costs billions annually. When critical infrastructure faces aggressive chloride environments, acidic streams, or elevated temperatures, standard austenitic stainless steels fail rapidly through pitting, crevice corrosion, or stress corrosion cracking (SCC). In these high-stakes scenarios, engineers inevitably ask: what exactly is the best nickel alloy for corrosion resistance? The reality of materials engineering is that a universal, invincible alloy does not exist. Material selection is an exercise in balancing localized chemistry, operating temperatures, and structural stability. To find the optimal solution, we must analyze the metallurgical mechanisms that govern passivity and active dissolution. Assessing High-Performance Grades via PREN When evaluating the […]<\/p>","protected":false},"author":1,"featured_media":2771,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2770","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"spectra_custom_meta":{"_edit_lock":["1772766101:1"],"_edit_last":["1"],"rank_math_internal_links_processed":["1"],"rank_math_seo_score":["70"],"rank_math_description":["Facing severe pitting? 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When critical infrastructure faces aggressive chloride environments, acidic streams, or elevated temperatures, standard austenitic stainless steels fail rapidly through pitting, crevice corrosion, or stress corrosion cracking (SCC). In these high-stakes scenarios, engineers inevitably ask: what exactly is the best nickel alloy for…","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/2770","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/comments?post=2770"}],"version-history":[{"count":1,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/2770\/revisions"}],"predecessor-version":[{"id":2773,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/posts\/2770\/revisions\/2773"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/media\/2771"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/media?parent=2770"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/categories?post=2770"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ja\/wp-json\/wp\/v2\/tags?post=2770"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}