龙虎国际娱乐网址

    1. <form id='Zpevjp'></form>
        <bdo id='Zpevjp'><sup id='Zpevjp'><div id='Zpevjp'><bdo id='Zpevjp'></bdo></div></sup></bdo>

            龙虎国际娱乐网址主营:Taber耐磨试验机,马丁代尔摩擦试验机,PV1210盐雾循环试验箱,ATLAS氙灯老化试验机,38DLPLUS超声波测厚龙虎国际娱乐网址
            站内搜索
            联系我们
            电  话: 021-32535039
            传  真: 021-32535039
            手  机: 13472521719
            网  址: dingzhi17.com
            联系人: 谢文清
            邮  箱: xiewenqing2000@126.com
            地  址: 上海市嘉定区德富路1198号803室太湖世家国际大厦
            技术文章
            Renault D17 2028 ECC1盐雾腐蚀标准
            2018-12-18
            Renault D17 2028 ECC1盐雾腐蚀标准

            ECS2017_3

            This document is to be considered as a whole, the parts of which shall not be separated.

            "Seul le texte français fait foi, les traductions n'étant faites que pour en faciliter l'emploi".

            "The French text alone is valid. The translations are provided to assist the reader in understanding the

            standards".

            © RENAULT 2002.

            No duplication permitted without the consent of the issuing department.

            No circulation permitted without the consent of RENAULT.

             

            DATE OF ISSUE

            May 1999 - - - This issue originates from Draft NC 1999 0219 / - - A

            REVISIONS

            October 2001 - - A Complete revision, the test piece or part sections are from now on

            dealt with in draft Standards 2001 0527 and 2001 0528.

            This issue originates from Draft NC 2001 0535 / - -

            June 2002 - - B Paragraphs 3., 4., 5., 6., 7. and annexes 2. and 2.2. modified.

            This issue originates from Draft NC 2002 0242 / - - -.

             

            1.  SCOPE AND FIELD OF APPLICATION

            This test method is intended to describe a cycle of the cyclic corrosion test 1 (Essai de Corrosion

            Cyclique 1: ECC1) on the associated equipment and the verifications which are necessary to make

            sure that the test is in conformity.

            This method may be applied to laboratory test pieces, to parts, or samples of vehicle parts.

            2.  PRINCIPLE

            The test pieces and/or parts are placed in an automatic corrosion chamber where they are exposed to

            a succession of attacks in controlled atmospheres, which simulate natural contamination by chloride

            ions, exposure to hot and humid atmosphere, and hot and dry atmosphere conditions.

            3.  APPARATUS AND REAGENTS

            3.1.  AUTOMATIC CORROSION CHAMBER

            This chamber shall make it possible to program the phases described below and to alternate them:

            NOTE: All these phases shall be performed at a controlled temperature of 35°C±0,8°C; their

            durations shall be programmable.

            3.1.1.  Contamination phase with spraying of saline solution

            The machine design shall make it possible to adjust the spray homogeneity and to obtain a rain

            quantity of 5 ml/h±1 ml/h at all points of the vat with the chamber empty or loaded.

            The pressure is between 0,7 bar and 1,6 bar.

            Moreover, in order to check that the salt spray phase has effectively taken place, the chamber shall

            be fitted with a system used to check the flow rate and total consumption of the saline solution.

            3.1.2.  Controlled humidity and drying phase

            The hygrometry shall be variable between 20 % and 95 % relative humidity with a constant air flow

            rate according to the profile defined in annex 1.

            The accepted tolerance is±3 % relative humidity, except for the 20 % relative humidity point where

            the accepted tolerance is±5 %.

            3.1.3.  Flushing phase

            This air flushing phase shall make it possible to eliminate the spray present in the chamber at the end

            of the saline solution spraying phase.

            3.1.4.  Wall rinsing phase

            This phase consisting in rinsing the chamber walls with de-mineralised water makes it possible to

            eliminate the salts deposited during the saline solution spraying phase and thus prevents the

            accumulation and therefore the concentration of salts during the cycles, which has an influence on the

            relative humidity profile. This is done with a rinsing pipe with nozzles located on the circumference of

            the vat. No spraying of de-mineralised water on the parts or test pieces is allowed.

             

            3.1.5.  Chamber environment

            -  This chamber shall be continuously connected to a saline solution tank. Use of a vat of limited

            capacity is recommended (to avoid solution variations: pH, Cl%).

            The vat shall be designed in such a way that it can be easily cleaned. Improper cleaning entails

            high flow drops, and therefore has an influence on the final quality of the test.

            This vat shall be made from a material which does not influence the pH (e.g. PVC), and shall be

            opaque to prevent bacteria and algae development during the test, which entails a degradation

            of the saline solution.

            -  If the saline solution is prepared in the vat, the latter shall be fitted with a shaker which does not

            react to the saline solution (example: stainless steel shaker covered with a plastic sheath).

            The outlet of the vat shall be fitted with a filter to prevent any possible contamination of the

            circuit and therefore avoid the risk of blocking the sprayers.

            -  The air entering the machine shall be de-oiled and filtered beforehand to avoid the presence of

            particles. This air has the following qualification:

            .  Filtered dry air free of water, oil,

            .  metallic or organic particles, impurities less than 0.2 mg/m 2 and diameter less than 5 µm.

            -  The water supply to the air humidifier and humidifier shall be de-ionised and have a minimum

            resistivity of 200 000 Ohms.

            3.2.  HOLDERS

            The test piece holders shall be entirely made from a material which is incorruptible under the test

            conditions (for example, PVC) and shall make it possible to incline the test pieces an/or parts

            by 20±5°with respect to the vertical.

            They shall be designed so as to avoid water retention areas.

            Moreover, it is very important that these holders be made so as not to interfere with the air flow in the

            chamber; therefore, it is necessary that all the PVC parts are hollowed to the maximum.

            Any streaming down the holders (for example, emanating from the water retention on the solution and

            air feed pipes, the wall rinsing, etc.) shall be avoided.

            The test pieces shall be pped on a single level (for 9 cm x 19 cm test pieces) and be at a

            sufficient height to let the air flow in the chamber.

            NOTE: it is important for the quality of the test not to overload the chamber (identical profile

            relating to the relative humidity and volume of saline solution received by each test piece).

            Example: maximum 110 samples 9 cm x 19 cm for a vat capacity of 1 200 litres.

            3.3.  SODIUM CHLORIDE

            In the anhydrous state, the sodium chloride shall not contain more than 0,2 % of total impurities and

            more than 0,1 % of sodium iodide.

            3.4.  PH-METER (minimum accuracy 0,1 pH).

            3.5.  SULPHURIC ACID 0,5 mol/l (1 N).

            4.  SOLUTION PREPARATION

            It is preferable to prepare a new solution before each test, and not prepare more than 50 litres at a

            time for each chamber to avoid any changes in it over time.

            NOTE: For chambers, the volume of which is greater than 3 m 3 , the volume of saline solution to be

            prepared is left to the judgement of the users.

            The solution which is sprayed during this test is a 1 % Na Cl, pH4 solution.

            The solution is prepared before each test according to the following steps:

            -  prepare the desired quantity of de-mineralised water (resistivity greater than 200 000 Ohms),

            -  start the paddle,

            -  add the quantity of salt which is calculated; the final solution is 1±0,05 % NaCl (10±0,5 g/l),

            -  when the salt has dissolved, wait for 4 hours minimum, then adjust the pH of the solution

            to 4,0±0,2 with sulphuric acid 1 N.

            To validate the salt concentration of the solution, the density is measured and recorded whenever the

            solution is prepared.

            It shall be between 1.0065 and 1.0075 (at 25°C).

            龙虎国际娱乐网址
            联系人:谢文清   联系电话:021-32535039   手机:13472521719   传真:021-32535039   联系地址:上海市嘉定区德富路1198号803室太湖世家国际大厦
            沪ICP备12035321号   技术支持:谷瀑环保   管理入口