Umuti ubuza umuringa cyangwa umuringa ni inyongeramusaruro ikoreshwa mu bikoresho bya polymer nka pulasitiki na rubber. Inshingano yayo nyamukuru ni ukubuza ingaruka zo gusaza za iyoni z'umuringa cyangwa umuringa ku bikoresho, gukumira kwangirika kw'ibintu, guhinduka ibara, cyangwa kwangirika kw'umutungo wa mekanike guterwa no gukora ku muringa. Ni ingenzi cyane cyane mu bintu nk'imiyoboro y'insinga, icyuma gikingira insinga, ibikoresho byo gupfunyikamo ibikoresho by'ikoranabuhanga, nibindi.

Umuringa n'ibyuma byawo (nk'insinga) bikoreshwa cyane mu kohereza ingufu, ariko iyo umuringa uhuye n'ibikoresho bimwe na bimwe bya polymer (nka PVC, polyethylene), bishobora guteza ibibazo bikurikira:

Oxidation ya kataletiki:
Cu2+ ni catalyst ikomeye ya oxidation yihutisha kuvunika kwa oxidative kw'iminyururu ya polymer, cyane cyane mu bidukikije birimo ubushyuhe bwinshi n'ubukonje.

Kwangirika kwa aside:
Mu bikoresho bifite halogen nka PVC, umuringa ushobora gukorana na HCl yangiritse bigatuma habaho chloride y'umuringa (CuCl2), bikongera kwihutisha ibora ry'ibikoresho (ingaruka zo kwikora ku giti cyabyo).

Kwangirika kw'isura:
Kwimuka kwa iyoni z'umuringa bishobora gutuma utudomo tw'icyatsi kibisi cyangwa umukara (ingufu z'umuringa) tugaragara ku buso bw'ikintu, bigatera ingaruka ku kugaragara kwacyo.

Uburyo bwo gukora kwa deactivator
Imiti igabanya ingaruka mbi za umuringa ikoresheje uburyo bukurikira:

Iyoni z'umuringa zivanze:
Iyo bihujwe na Cu2+, hakorwa complexes zihamye kugira ngo zihagarike imikorere yazo ya catalytic (nk'ibinyabutabire bya benzotriazole).

Guhindura ubuso bw'umuringa:
Kora agapira gakingira hejuru y'umuringa kugira ngo wirinde ko ions z'umuringa zisohoka (nk'ibinyabutabire bya fosifore).

Ibintu bigabanya aside:
Muri PVC, bimwe mu bikoresho bihagarika ibikorwa bishobora kugabanya HCl ikorwa no kubora, bikagabanya kwangirika kw'umuringa (nk'ibice bikomeza umunyu wa lead bifite ubushobozi bwo kurwanya umuringa).

Ibikoresho bihagarika umuringani ubwoko bwa "Invisible Guardian" mu bikoresho bya polymer byongera cyane ubuzima bw'ibicuruzwa nk'insinga zirinda imikorere y'umuringa. Ishingiro ry'ikoranabuhanga ryayo riri mu kugabanya neza imikorere y'ibinyabutabire no kunyura hejuru y'ubutaka, mu gihe bihuza ibidukikije n'uburyo budakoresha amashanyarazi menshi. Mu gushushanya insinga, formula ihuzaibikoresho byo guhagarika ibikorwa, ikintu kidakoresha umuriron'izindi nyongeramusaruro ni ingenzi kugira ngo ibikoresho bikomeze kwizerwa igihe kirekire.