由于城市污水成分復(fù)雜,污水處理廠的鋼制設(shè)備腐蝕是普遍現(xiàn)象。這是由于污水中含有營養(yǎng)物,以及礦物質(zhì)和硫化氫氣體。Due to the complex
composition of urban sewage, corrosion of steel equipment in sewage treatment
plant is a common phenomenon. This is because the sewage contains nutrients,
minerals and hydrogen sulfide
gas。
硫化氫氣體是一種高腐蝕性的致命的物質(zhì)。這種氣體再結(jié)合著幾個其他包括PH值的變化和用于處理污水的礦物質(zhì),以及溫度的波動,這些都是許多涂料失敗的原因。Hydrogen
sulfide gas is a highly corrosive and lethal substance. This gas, combined with
several other minerals, including changes in pH, minerals used to treat sewage,
and fluctuations in temperature, are responsible for many coating failures.
生活污水中含有機(jī)營養(yǎng)物、化合物和硫化氫氣體。硫化氫氣體是一種高腐蝕性的致命的物質(zhì)。因此地埋式污水處理設(shè)備內(nèi)部的管材需要精選。Domestic
sewage contains organic nutrients, compounds and hydrogen sulfide gas. Hydrogen
sulfide gas is a highly corrosive and lethal substance. Therefore, the pipes
inside the buried sewage treatment equipment need to be
selected。大多數(shù)的金屬管材并不適合污水處理設(shè)備,即便涂上防銹涂料也難以有效延長其壽命。因此設(shè)備的棺材宜選取優(yōu)質(zhì)的PVC管材。