571356 ROCOR NB LIQUID 25 LTR

Product information

Specification

Approvals

• Approved by all major engine manufacturers

Directions for use

NALFLEET? Rocor NB Liquid is a highly effective corrosion inhibitor for the common ferrous and non-ferrous metals in cooling water systems. The stable oxide film that is formed prevents corrosion caused by electrolytic action between dissimilar metals used in the system. NALFLEET? Rocor NB Liquid has been field tested and found to have no detrimental effects on non metallic substances such as seals, glands, packing, hoses, gaskets etc., normally used in these systems. The compound is alkaline and so will suppress acid corrosion, which would otherwise result in corrosion damage such as pitting. However, the alkalinity control is such that even if the product is accidentally overdosed, the pH of the water will remain within limits. The metals which would be affected by extremes of alkalinity or acidity are protected. In cases where systems are contaminated with oil and/or scale they should be cleaned before starting to apply NALFLEET? Rocor NB Liquid. There are suitable WSS products to carry out the cleaning. Degreasing should be carried out using UNITOR? Seaclean Plus and descaling by using UNITOR? Descalex. Refer to Water Treatment handbook. Freeze protection can be required if the vessel is to be laid up in cold areas. NALFLEET? Rocor NB Liquid can be used in conjunction with glycols to provide suitable freeze protection. If the system contains zinc galvanized parts, it is advisory to clean the system with Descalex prior to commencing the treatment.

NALFLEET? Rocor NB is not suitable for use in cooling systems containing aluminium components.

For general guidance where aluminium is present:

No aluminium present - Use Engine Water Treatment 9-108 or Rocor NB Liquid

<10% Aluminium - Use NALFLEET 2000 or Cooltreat AL

>10% Aluminium - Use Cooltreat AL

Dosing method

NALFLEET? Rocor NB Liquid should be dosed to a suitable point in the system. If the expansion tank is used then adequate circulation must be assured.

Sampling and testing

The Spectrapak Test Kit provides the necessary equipment to carry out the control tests. Obtain a representative sample of the cooling water. Carry out the tests immediately after sampling (following the instructions given in the Test Kit) and log the results in Waterproof. The results should be sent to WSS as stated in the Waterproof instructions. Use the dosage chart overleaf to adjust treatment to obtain the optimum level. It is important that testing is carried out at least once per week, to ensure levels of treatment are correct.

Dosage and Control

Initial dosage for an untreated system is 9 litres of NALFLEET? Rocor NB Liquid/1000 litres of untreated distilled/technical water. This will bring the treatment up to the minimum level of 1000 ppm nitrite. The dosage chart given below is for convenience in calculating the amount of NALFLEET? Rocor NB Liquid required to bring the treatment level to the suitable point between the minimum and maximum - this being 1440 ppm nitrite.

Normal nitrite limits: 1000-2400 ppm nitrite (NO2)

N.B.Buffering agents in NALFLEET? Rocor NB Liquid maintain pH values within suitable limits when the product is dosed as recommended. Normal pH should be maintained between 8.3 and 10 by the treatment. The engine manufacturer's recommendations for water quality should always be complied with.

Chloride levels should always be as low as possible. Most engine manufacturers recommend a maximum of 50 ppm chlorides. For this reason, Wilhelmsen Ships Service recommends the use of distilled water as make-up.

產品特性

? 液體產品，易于使用

? 通過在金屬表面上形成氧化膜，可以防止電解腐蝕

? 有效防止氣蝕和腐蝕

? 與軟管，墊圈和密封件兼容

優勢

? 主要柴油發動機制造商批準

? 簡單的控制測試

該產品可用于許多類型的封閉式再循環系統中的腐蝕抑制，例如：

? 柴油發動機冷卻水系統

? 壓縮機冷卻水系統

? 集中冷卻系統

? 熱水加熱系統

? 輔助機械冷卻系統

訂購信息

Product number                           Product name

571356                                       ROCOR NB LIQUID 25 LTR

亞硝酸鹽，氯化物和pH值測試工具包。

Product Number                           Product name

739466                                       SPECTRAPAK 309

認證

? 獲得所有主要發動機制造商的認可

? 挪威國家公共衛生研究所批準用于冷卻水用于蒸發器加熱的系統

使用說明

NALFLEET? Rocor NB Liquid 是一種高效緩蝕劑，適用于冷卻水系統中常見的黑色金屬和有色金屬。形狀穩定的氧化膜防止由系統中使用的不同金屬之間的電解作用引起的腐蝕。NALFLEET? Rocor NB Liquid 經過現場測試，發現對通常用于這些系統的非金屬物質（如密封件，密封管，填料，軟管，墊圈等）沒有任何不利影響。該化合物是堿性的，因此可以抑制酸腐蝕，否則會導致腐蝕，如點蝕。然而，堿度控制使得即使產品意外地過量，水的pH也將保持在限度內。受極端堿度或酸度影響的金屬受到保護。如果系統被油污和/或水垢污染，應在開始使用NALFLEET? Rocor NB Liquid. 之前進行清潔。有合適的WSS產品可以進行清潔。脫脂應使用UNITOR? Seaclean Plus進行，并使用UNITOR?Descalex進行除垢。

請參閱水處理手冊。如果要將容器放置在寒冷地區，有時需要使用防凍劑，因此NALFLEET?Rocor NB Liquid可與防凍產品一起使用。

如果系統包含鋅鍍鋅部件，建議在開始處理前用Descalex清潔系統。

NALFLEET?Rocor NB 不適用于含鋁組件的冷卻系統。

加藥方法

NALFLEET? Rocor NB Liquid 應加入系統中合適的位置。如果使用膨脹水箱，則必須確保充分的循環。

采樣和測試

Spectrapak測試套件提供了執行控制測試所需的設備。獲得冷卻水的代表性樣品。取樣后立即進行測試（按照測試工具包中的說明）并將結果記錄在防水中。結果應按照防水說明中的說明發送至WSS。使用背面的劑量圖來調整治療以獲得最佳水平。重要的是每周至少進行一次測試，以確保治療水平正確。.

劑量和控制

未處理系統的初始劑量是9升NALFLEET TM Rocor NBLiquid / 1000升未處理的蒸餾水。這將使處理達到1000ppm亞硝酸鹽的最低水平。下面給出的劑量圖是為了方便計算NALFLEET?Rocor NB液體的量，使處理水平達到最小值和最大值之間的合適點- 這是1440 ppm亞硝酸鹽。

正常亞硝酸鹽限量：1000-2400 ppm亞硝酸鹽（NO2）

當產品按推薦劑量給藥時，NALBLEET?Rocor NB液體中的N.B.緩沖劑將pH值保持在合適的限度內。通過處理，正常pH值應保持在8.3和10之間。應始終遵守發動機制造商對水質的建議。

氯化物含量應始終盡可能低。大多數發動機制造商建議最多

50 ppm氯化物。因此，Wilhelmsen Ships Service建議使用蒸餾水作為補水。