Er osti manbalaridan dengiz suvi

Er osti manbalaridan tuzli suv dengiz suvidan ko'ra yuqori tog 'miqyosidagi mazmunga ega, ko'pincha u 30% ga, ya'ni faqat eriymonlik chegarasi ostida. Here again, common salt is the major constituent. PH qiymati odatda nisbatan past (taxminan 4 ga), ya'ni suv kislokarsiz. Holbuki kislorod tarkibi juda past yoki hatto mavjud emas, H b₂ tarkibida bir necha yuz millgramm litr miqdorida bo'lishi mumkin.

Dengiz suvidagi korroziya

Ish bilan band bo'lgan materiallar nafaqat yagona korroziyaga etarlicha yuqori qarshilik ko'rsatish, balki mahalliy korroziyaga nisbatan katta qarshilik ko'rsatish, ayniqsa, tanazzul va krevod korroziyaga qarshi. Such corrosion phenomena are experienced especially with selfpassivating ferro alloys (stainless steels). So-called 'standby' pumps, which are only operated intermittently, run the risk of standstill corrosion; flooding with fresh water prior to a shut-down period or periodic start-up is considered advantageous.

Har xildengiz suv nasosiGalvanika korroziyasini oldini olish uchun komponentlar bir xil turdagi materiallardan amalga oshirilishi kerak. The potential difference between the individual materials is to be as low as possible. Biroq, agar projeed sabablari uchun ishlatiladigan materiallardan farqli o'laroq, suv bilan aloqada kamroq metallarning sirtlari olijanob metallarga nisbatan katta bo'lishi kerak. Figure 5 provides information on the danger of galvanic corrosion when different type materials are combined.

High velocities can lead to erosion corrosion. The consequences become increasingly serious, the more aggressive the medium, and the higher its velocity. Holbuki oqim darajasi zanglamaydigan po'latlarning va nikel qotishmalarining xatti-harakatlariga ta'sir qiladi, faqat qora rangli materiallar va mis qotishmalari jalb qilingan joyda pozitsiya bekor qilinadi. Figure 6 provides qualitative information on the influence of flow rates. Due consideration must be given thereby as to whether the medium contains oxygen or H₂S. Large quantities of H₂S tend to exclude the presence of oxygen; in such cases, the medium is slightly acidulous, down to a pH of 4.

Moddiy xatti-harakatlar

Table 1 makes recommendations for pump materials or their combinations. Agar boshqacha ko'rsatilmagan bo'lsa, quyidagi ma'lumotlar hech qanday H₂ ning tarkibisiz dengiz suvi uchun qo'llaniladi.

Unalloyed steel is unsuitable for sea water, unless it is provided with a suitable protective coating. Quyma temir faqat past tezliklar uchun ishlatilishi kerak (jo'natmalar uchun mumkin); Bunday holda, boshqa ichki a'zolarni normal katorativ ravishda himoya qilish kerak.