{"id":389,"date":"2015-08-27T14:18:00","date_gmt":"2015-08-27T14:18:00","guid":{"rendered":"http:\/\/machineryequipmentonline.com\/hydraulics-and-pneumatics\/uncategorized\/hydraulic-fluidsneutralization-number\/"},"modified":"2015-08-27T14:18:00","modified_gmt":"2015-08-27T14:18:00","slug":"hydraulic-fluidsneutralization-number","status":"publish","type":"post","link":"http:\/\/machineryequipmentonline.com\/hydraulics-and-pneumatics\/hydraulic-fluidsneutralization-number\/","title":{"rendered":"Hydraulic fluids:Neutralization number"},"content":{"rendered":"<div class=\"rbmcb6a0dbcb179a82\" ><script type=\"text\/javascript\">\n\tatOptions = {\n\t\t'key' : '61e5902552e2353963d8d2f1bd1f4a8f',\n\t\t'format' : 'iframe',\n\t\t'height' : 250,\n\t\t'width' : 300,\n\t\t'params' : {}\n\t};\n<\/script>\n<script type=\"text\/javascript\" src=\"\/\/www.highperformanceformat.com\/61e5902552e2353963d8d2f1bd1f4a8f\/invoke.js\"><\/script><\/div><style type=\"text\/css\">\r\n@media screen and (min-width: 1201px) {\r\n.rbmcb6a0dbcb179a82 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.rbmcb6a0dbcb179a82 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.rbmcb6a0dbcb179a82 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.rbmcb6a0dbcb179a82 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.rbmcb6a0dbcb179a82 {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n<h5 align=\"justify\">Neutralization number<\/h5>\n<p align=\"justify\">The neutralization number is a measure of the relative acidity or alkalinity of a hydraulic fluid and is specified by the pH level. A fluid having a smaller neutralization number is recommended, as high-acidity or high-alkaline fluid can cause corrosion of metal parts as well as a deterioration of seal and packing glands.  <\/p>\n<p align=\"justify\">For an acidic fluid, the neutralization number equals the number of milligrams (mg) of potassium hydroxide necessary to neutralize the acid in a 1 g sample. In the case of an alkaline fluid, the neutralization number equals the amount of alcoholic hydrochloric acid that is necessary to neutralize the alkali in a 1 g sample of hydraulic fluid. With use, hydraulic fluid normally has a tendency to become more acidic than basic.  <\/p>\n<p align=\"justify\">The neutralization number of a hydraulic fluid can be determined by the following test procedure as illustrated by Figure 8.2.  <\/p>\n<p align=\"justify\">The oil sample is placed in a titration solution of distilled water, alcohol, toluene and an indicating agent known as naphthol benzene, which changes color from orange to green when neutralization occurs.  <\/p>\n<p align=\"justify\">Alcoholic potassium hydroxide is added from a burette drop by drop, until the solution changes its color from orange to green. The neutralization number is then calculated using the following formula,  <\/p><div class=\"lyfwk6a0dbcb179cd9\" ><script type=\"text\/javascript\">\n\tatOptions = {\n\t\t'key' : '0c1eb4c533eaedb7b996f49a5a4983a9',\n\t\t'format' : 'iframe',\n\t\t'height' : 300,\n\t\t'width' : 160,\n\t\t'params' : {}\n\t};\n<\/script>\n<script type=\"text\/javascript\" src=\"\/\/www.highperformanceformat.com\/0c1eb4c533eaedb7b996f49a5a4983a9\/invoke.js\"><\/script><\/div><style type=\"text\/css\">\r\n@media screen and (min-width: 1201px) {\r\n.lyfwk6a0dbcb179cd9 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.lyfwk6a0dbcb179cd9 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.lyfwk6a0dbcb179cd9 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.lyfwk6a0dbcb179cd9 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.lyfwk6a0dbcb179cd9 {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n<div class=\"yybml6a0dbcb179b7b\" ><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-0778475562755157\"\n     crossorigin=\"anonymous\"><\/script>\n<!-- 300x600 hydraulics-and-pneumatics -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:300px;height:600px\"\n     data-ad-client=\"ca-pub-0778475562755157\"\n     data-ad-slot=\"3735577695\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><style type=\"text\/css\">\r\n@media screen and (min-width: 1201px) {\r\n.yybml6a0dbcb179b7b {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.yybml6a0dbcb179b7b {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.yybml6a0dbcb179b7b {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.yybml6a0dbcb179b7b {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.yybml6a0dbcb179b7b {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n\n<p align=\"justify\"><a href=\"http:\/\/lh3.googleusercontent.com\/-4TphqHc6SHQ\/Vd8b4jZzfTI\/AAAAAAAB22Q\/ItP14cLRm0s\/s1600-h\/Hydraulic-fluids-02122.jpg\"><img decoding=\"async\" loading=\"lazy\" style=\"background-image: none; border-right-width: 0px; margin: 0px auto; padding-left: 0px; padding-right: 0px; display: block; float: none; border-top-width: 0px; border-bottom-width: 0px; border-left-width: 0px; padding-top: 0px\" title=\"Hydraulic fluids-0212\" border=\"0\" alt=\"Hydraulic fluids-0212\" src=\"http:\/\/lh3.googleusercontent.com\/-2LwxvSg-81U\/Vd8cFYdDOlI\/AAAAAAAB23M\/Vq7FYGwl2rE\/Hydraulic-fluids-0212_thumb.jpg?imgmax=800\" width=\"341\" height=\"45\" \/><\/a>  <\/p>\n<p align=\"justify\">Hydraulic fluids, which have been treated with additives in order to inhibit the formation of acids, are usually able to keep this number at a low value of 0 or 0.1.  <\/p>\n<p align=\"justify\"><a href=\"http:\/\/lh3.googleusercontent.com\/-kTmPvfytnTQ\/Vd8cJblDkVI\/AAAAAAAB23s\/LCBsWNV5yC4\/s1600-h\/Hydraulic-fluids-02136.jpg\"><img decoding=\"async\" loading=\"lazy\" style=\"background-image: none; border-right-width: 0px; margin: 0px auto; padding-left: 0px; padding-right: 0px; display: block; float: none; border-top-width: 0px; border-bottom-width: 0px; border-left-width: 0px; padding-top: 0px\" title=\"Hydraulic fluids-0213\" border=\"0\" alt=\"Hydraulic fluids-0213\" src=\"http:\/\/lh3.googleusercontent.com\/-iPdLKQCkR8E\/Vd8cQsSrTSI\/AAAAAAAB24c\/NecHPRX34-I\/Hydraulic-fluids-0213_thumb1.jpg?imgmax=800\" width=\"408\" height=\"484\" \/><\/a>  <\/p>\n<p align=\"justify\">\n<p align=\"justify\"><i><\/i> <\/p>\n<p align=\"justify\">\n","protected":false},"excerpt":{"rendered":"<p>Neutralization number The neutralization number is a measure of the relative acidity or alkalinity of a hydraulic fluid and is specified by the pH level. A fluid having a smaller neutralization number is recommended, as high-acidity or high-alkaline fluid can cause corrosion of metal parts as well as a deterioration of seal and packing glands. 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