發布時間：2026-04-23 02:39:03 人氣：304346 來源：川工密封
1.整體腐蝕和局部腐蝕。綜合腐蝕，即與介質接觸的零件表麵發生均勻腐蝕，其特點是零件重量減輕，甚至完全腐蝕；失去力量；降低硬度。如1Cr18Ni9Ti不bu鏽xiu鋼gang製zhi成cheng的de多duo彈dan簧huang，在zai稀xi硫liu酸suan中zhong使shi用yong會hui出chu現xian這zhe種zhong情qing況kuang。局ju部bu腐fu蝕shi可ke以yi簡jian單dan地di通tong過guo零ling件jian上shang的de腐fu蝕shi點dian和he孔kong來lai識shi別bie。局ju部bu腐fu蝕shi是shi多duo相xiang合he金jin中zhong的de某mou一yi相xiang或huo單dan相xiang固gu溶rong體ti中zhong的de某mou一yi元yuan素su被bei介jie質zhi選xuan擇ze性xing溶rong解jie的de腐fu蝕shi形xing式shi。如ru鈷gu基ji硬ying質zhi合he金jin在zai高gao溫wen強qiang堿jian條tiao件jian下xia使shi用yong，粘zhan結jie相xiang金jin屬shu鈷gu容rong易yi被bei腐fu蝕shi，硬ying質zhi相xiang碳tan化hua鎢wu骨gu架jia失shi去qu強qiang度du，在zai機ji械xie力li的de作zuo用yong下xia導dao致zhi晶jing粒li剝bo落luo。作zuo為wei另ling一yi個ge例li子zi，由you於yu遊you離li矽gui的de腐fu蝕shi，反fan應ying燒shao結jie碳tan化hua矽gui的de表biao麵mian顯xian示shi麻ma點dian(PH>10時).
腐(fu)蝕(shi)對(dui)密(mi)封(feng)件(jian)的(de)性(xing)能(neng)有(you)很(hen)大(da)影(ying)響(xiang)。由(you)於(yu)密(mi)封(feng)比(bi)主(zhu)機(ji)的(de)零(ling)件(jian)更(geng)小(xiao)，精(jing)度(du)更(geng)高(gao)，所(suo)以(yi)通(tong)常(chang)選(xuan)擇(ze)比(bi)主(zhu)機(ji)密(mi)封(feng)耐(nai)腐(fu)蝕(shi)的(de)材(cai)料(liao)。對(dui)於(yu)與(yu)介(jie)質(zhi)直(zhi)接(jie)接(jie)觸(chu)的(de)密(mi)封(feng)件(jian)，可(ke)參(can)考(kao)相(xiang)關(guan)腐(fu)蝕(shi)手(shou)冊(ce)中(zhong)的(de)數(shu)據(ju)選(xuan)擇(ze)合(he)適(shi)的(de)材(cai)料(liao)。然(ran)而(er)，這(zhe)些(xie)數(shu)據(ju)可(ke)能(neng)與(yu)資陽機械密封係統中使用的條件不一致，因為它們大多是靜態條件下的腐蝕數據，並且工藝流程中的介質包含雜質或二次化合物。經驗表明，壓力、溫度和滑動速度都會加速腐蝕。隨著溫度的升高，密封件的腐蝕速率呈指數增長。
在zai處chu理li強qiang腐fu蝕shi性xing流liu體ti時shi，采cai用yong外wai密mi封feng或huo雙shuang端duan密mi封feng可ke以yi最zui大da限xian度du地di減jian少shao腐fu蝕shi對dui密mi封feng的de影ying響xiang，因yin為wei它ta與yu工gong藝yi流liu體ti接jie觸chu的de零ling件jian數shu量liang最zui少shao。這zhe也ye是shi在zai強qiang腐fu蝕shi條tiao件jian下xia選xuan擇ze密mi封feng結jie構gou最zui古gu老lao的de窯yao理li之zhi一yi。
2.應力腐蝕。應力腐蝕是金屬材料在應力作用下在腐蝕環境中的腐蝕現象。無論是外載荷還是殘餘應力，都會加劇腐蝕。奧氏體不鏽鋼、tonghejindeng。rongyichanshengyinglifushi。zaiyinglifushiguochengzhong，yibanzaijinshubiaomianxingchengxuanzexingfushicao，ranhoujixujubufushi，zuihouzaiyinglizuoyongxiacongcaodichanshengliewen。dianxingdelizishi104型資陽機械密封的傳動套筒，由1Cr18Ni9Ti製zhi成cheng。在zai氨an水shui泵beng中zhong使shi用yong時shi，傳chuan動dong套tao筒tong的de傳chuan動dong耳er環huan最zui容rong易yi產chan生sheng應ying力li腐fu蝕shi裂lie紋wen，從cong而er損sun壞huai耳er環huan。所suo以yi把ba凹ao耳er釘ding換huan成cheng實shi心xin耳er片pian可ke以yi防fang止zhi這zhe種zhong應ying力li腐fu蝕shi。
3.jiezhifushi。mifengjianheliutizhijiandegaosuyundongdaozhijiechubiaomianshangdeweixiaobujunyun。dangliutiweifushixingjiezhishi，huijiasumifengjiechumiandehuaxuefanying，youshiyouyi，youshiyouhai。ruguoxingchengdeyanghuacengbeipohuai，jiuhuifashengfushi。mosunhemoshijiaotizuoyongduicailiaozaochengdesunshangchengweimoshi。tongchang，mosundui資陽機械密封的非主要部件造成的損壞，如彈簧座、推環、huanzuodeng。bingbunengxunsufanyingmifengxingnengdebianhua，danqueshimocafushixiaodezhuyaoxingshizhiyi。yinci，zaiqiangtidefushijiezhizhong，mocafuyingyounaifushixinghaodecailiaozhicheng。liru，shiyong99.5%高純度氧化鋁陶瓷或不含遊離矽的熱壓燒結碳化矽。
4.jianxifushi。dangjiezhichuyujinshuyujinshuhuofeijinshugoujianzhijian，qiecunzaixiaojianxishi，youyujiezhichuyutingzhizhuangtai，jianxineijinshudefushihuijiasu，zhezhongxianxiangchengweijianxifushi。liru資陽機械密封彈簧座與軸之間的溝槽或衝蝕點，補償環輔助密封環與軸之間的溝槽或衝蝕點(這裏當然有微動磨損)就jiu是shi典dian型xing的de例li子zi。原yuan因yin是shi接jie頭tou內nei的de介jie質zhi處chu於yu停ting滯zhi狀zhuang態tai，使shi得de參can與yu腐fu蝕shi反fan應ying的de物wu質zhi難nan以yi加jia入ru接jie頭tou內nei，接jie頭tou內nei的de腐fu蝕shi產chan物wu難nan以yi向xiang外wai擴kuo散san。隨sui著zhe腐fu蝕shi的de進jin行xing，接jie頭tou中zhong的de介jie質zhi在zai成cheng分fen濃nong度du和hePHzhishangyuzhenggejiezhiyuelaiyuebutong，daozhijietouzhongjinshubiaomiandefushijiaju。jianxifushiduimifengxingnengfeichangyouhai。mifengquanyushuangzhouzhijiandeaocaohuidaozhibuchanghuanwufazhouxiangweiyi，shiqusuidongxing，daozhiduanmianfenlihexielou。jianxifushitongchangkeyitongguoshidangdecailiaoxuanzehehelidejiegoushejilaihuanjie。biruxuanzekangjianxifushixingnenghaodecailiao；在zai結jie構gou設she計ji中zhong，應ying盡jin可ke能neng避bi免mian液ye體ti積ji聚ju的de間jian隙xi和he死si區qu。采cai用yong自zi衝chong洗xi循xun環huan，使shi密mi封feng腔qiang內nei的de介jie質zhi處chu於yu不bu斷duan更geng換huan和he流liu動dong的de狀zhuang態tai，防fang止zhi介jie質zhi成cheng分fen的de濃nong度du變bian化hua；duiyuchangqitingyongdebeng，yingjishipaichujijudeyetideng。bukenengwanquanxiaochujiegoushangdechaju。suoyiyibancaiyongfanghuzhoucheng，keyizaimifengquananzhuangbuweipentunaifushicailiaolaifangzhi。
5.電化學腐蝕。事實上，資陽機械密封的各種腐蝕形式或多或少都與銅的電化學腐蝕有關。就資陽機械密封摩mo擦ca副fu而er言yan，它ta們men經jing常chang受shou到dao電dian化hua學xue腐fu蝕shi的de損sun害hai，因yin為wei摩mo擦ca副fu中zhong通tong常chang使shi用yong不bu同tong的de材cai料liao。當dang它ta們men處chu於yu電dian解jie質zhi溶rong液ye中zhong時shi，不bu同tong材cai料liao接jie觸chu時shi會hui出chu現xian點dian耦ou合he效xiao應ying，即ji一yi種zhong材cai料liao的de腐fu蝕shi得de到dao促cu進jin，另ling一yi種zhong材cai料liao的de腐fu蝕shi得de到dao抑yi製zhi。例li如ru，當dang銅tong和he鎳nie鉻ge鋼gang用yong於yu氧yang化hua介jie質zhi時shi，鎳nie鎘ge鋼gang被bei電dian離li和he分fen解jie。鹽yan水shui、海水、稀鹽酸、稀硫酸等。都是典型的電解質溶液，密封件容易發生電化學腐蝕。所以最好選擇材料或者電位相近的陶瓷，以及玻璃纖維填充的PTFE。
