Alloy 20 (Alloy 20) waa allo aunalnitic oo ku saleysan birta oo la sameeyay si looga hortago daxanka acid ee sulfuric acid. Waxay leedahay iska caabin aad u wanaagsan oo ah xarkaha acid ee sulfuric acid; Waxay leedahay iska caabbinta adag ee aashitada fosfooraska, nitric acid iyo jawiga chlorided, chloride walwalka carbiska, xidhashada-goynta iyo jajabinta. Sidaa darteed, Alloy 20 waxay leedahay magaca anti-suulyo alloy; Waxay leedahay codsiyo fara badan oo kala duwan: sida: kiimikada, cuntada, dawada, soosaarka korantada iyo warshadaha balaastigga ayaa isticmaali doona. Wixii caabbinta ah ee iska caabbinta tuubbada iyo jiirka chloride, dhibaatooyinka is-afgaradka culeyska, iwm., Alkoy 20 ayaa badanaa la isticmaalaa.