If dissimilar metals come in contact with one another, the least noble of the two will sacrifice electrons to the other metal, causing corrosion of the metal. This situation is exacerbated by the presence of moisture and/or salt.
Following is a scale of metals from most noble to least noble: Gold, Platinum, Carbon/Graphite, Titanium, Silver, Chrome, Inconel, Nickel, Monel, Bronze, Copper, Brass, Tin, Lead, Cast Iron, Steel, Iron, Cadmium, Aluminum, Zinc, Magnesium. The closer two metals are on the scale, the better they will perform together. However, electrolysis can occur between any dissimilar metals.
Care should be taken to keep dissimilar metals form coming in contact with one another. In some cases, zinc-coated galvanized steel and aluminum have been used together. While this is not recommended ever, the fact that zinc and aluminum are very close to one another on the nobility scale means that the electrolysis will occur very slowly. Electrolysis will be worst in areas prone to water and salt. Additionally, it is noted that the chemicals used in treated lumber can also shorten the life of metals they come in contact with. Separation between dissimilar materials can be done with building felt or a rubberized material.
Kama metali tofauti zinakutana, ile isiyo na thamani zaidi itatoa elektroni kwa metali nyingine, na hivyo kusababisha kutu. Hali hii ni kuongezeka na uwepo wa unyevu na / au chumvi. Chini ni kiwango cha metali kutoka kwa heshima zaidi hadi chini ya heshima: Dhahabu, Platinum, Carbon, Grafiti, Titanium, Fedha, Chromium, Inconel, Nickel, Monel, Shaba, Shaba, Tin, Chuma, Chuma, Cadmium, Aluminium, Zinc, Magnesium. Madini mawili yanapokuwa karibu zaidi kwenye mizani, yatatenda vizuri zaidi pamoja. Hata hivyo, electrolysis inaweza kutokea kati ya yoyote metali dissimilar. Uangalifu unapaswa kuchukuliwa ili kuweka metali tofauti fomu kuja katika kuwasiliana na kila mmoja. Katika visa fulani, chuma kilichopakwa zinki na alumini kimetumiwa pamoja. Ingawa hii haipendekezi kamwe, ukweli kwamba zinki na alumini ziko karibu sana kwenye kiwango cha utajiri inamaanisha kwamba electrolysis itatokea polepole sana. Uchambuzi wa umeme utakuwa mbaya zaidi katika maeneo yenye maji na chumvi. Kwa kuongezea, inabainishwa kwamba kemikali zinazotumiwa katika mbao zilizotengenezwa kwa mbao zinaweza pia kufupisha maisha ya metali zinazoguswa nazo. Kutenganisha kati ya vifaa tofauti inaweza kufanyika na ujenzi waliona au nyenzo rubberized.